The first day of summer is forecast to bring some of the worst heat the southwestern U.S. has seen in years.

The forecast calls for 119 degrees in Phoenix, where some flights have been canceled because certain planes can't take off in extreme heat.

Arizona is seeing the most stifling temperatures, but the wrath of the heat wave is being felt across Nevada and California as well.

Las Vegas was forecast to hit 117 degrees on Tuesday and excessive heat warnings cover almost all of California.

Phoenix hit 118 degrees on Monday, which the National Weather Service says is quite rare. In fact, temperatures of 118 or above have only been recorded 15 times since records were first kept in 1896.

Forecasters also warned Phoenix could hit 120 degrees this week.

Phoenix has hit the 120 mark only three times in recorded history — the last time 22 years ago. The record high was 122 degrees, recorded June 26, 1990.

In addition to grounding flights of smaller planes, airlines have been taking other measures on larger jets to reduce their weight because of the heat.

American Airlines spokesman Ross Feinstein said the carrier began limiting sales on some flights to prevent the planes from exceeding maximum weight for safe takeoff in the hot conditions. Airlines can use other strategies for dealing with limitations on the planes during hot weather, including reducing the amount of luggage and cargo and not fueling completely to make the plane lighter for takeoff.</s>San Francisco (CNN) It's so hot in the West that the scorching heat is breaking records, causing massive power outages and prompting flight cancellations.

On Tuesday, Phoenix hit a daily record reaching 119 degrees Fahrenheit, which ranked as the fourth hottest day on record for the Arizona city. Death Valley, California, lived up to its name as it set a daily record at a high of 127 degrees, according to the National Weather Service.

It was a scorcher! Here's a look at some of the records beat or tied, some of which were all time records! #nvwx #cawx #azwx #VegasWeather pic.twitter.com/eMb7HgvvjI

Excessive heat warnings have been issued for inland California, southern Nevada and parts of southwest Arizona until Friday. More than 29 million residents in California are under a heat warning or advisory.

Here's how the sweltering heat wave is affecting the West:

1. Some planes can't fly

The heat wave was already affecting travel in Phoenix, American Airlines canceled 43 flights Tuesday to and from Phoenix Sky Harbor Airport due to extreme heat, the airline said.

There could be more cancellations later Tuesday, an airline spokesman said. Seven flights were canceled due to weather on Monday, when the temperature reached 118 degrees, rounding out the total to 50 weather-related cancellations in two days.

Some smaller regional jets cannot take off in temperatures hotter than 117 degrees, it said in a statement.

"Our smaller regional operations -- those that use our CRJ aircraft types -- will be most affected by the heat," the airline's communication specialist Kent Powell told CNN. "We really aren't expecting any change to the operation with our mainline aircraft."

Because hotter air is thinner, planes also need more speed to take off and, thus, require more runway. Sky Harbor's runways are long enough to accommodate most planes in hot weather, American Airlines said.

2. Heat records are being shattered

-- In Phoenix, the 118 degrees on Monday tied the record set exactly a year ago.

Today's high of 118F in #Phoenix ties the record set 1 year ago. If we hit our forecast highs Tue & Wed it would set 2 new records. #azheat pic.twitter.com/REMwhT2FQP — NWS Phoenix (@NWSPhoenix) June 20, 2017

-- On Sunday, several Northern California cities -- including Sacramento (106 degrees), San Jose (103 degrees) and San Francisco (88 degrees) -- saw record hot temperatures.

-- The record-breaking continued Monday with Sacramento hitting 107 degrees, a step hotter than its 106-degree record from 1988. It could get even hotter on Wednesday, with a forecast temperature of 109 degrees.

High temperatures looking to surpass the new record of 106 degrees on Sunday.

-- On Monday, Stockton, California, saw a record high of 109 degrees and Lancaster in southern part of the state had 110 degrees.

3. Wildfires are burning

Firefighters across California are battling several fires, including one near Big Bear spreading to 950 acres. They dealt with a grass fire in Sacramento that broke out during Monday's evening commute.

Cal Fire warned of high fire danger with hot and dry conditions.

4. Power is being knocked out

Power outages have been reported over the last few days in California's Central Valley, the Bay Area and southern parts of the state.

As temperatures increase, more people turn on air conditioners, which use a lot of electricity and can strain the power system.

5. Roads buckle under the heat

The heat could've been a factor as four lanes of Highway 50 in West Sacramento began to buckle on Sunday. Drivers reported the giant cracks forming on the road and the lanes were repaired, reported CNN affiliate KGO.

What it actually feels like outside when you take into account the humidity and high temperature.

How to beat the heat

JUST WATCHED What NOT to do in a heat wave Replay More Videos ... MUST WATCH What NOT to do in a heat wave 01:14

Heat kills more people in the United States than any other type of weather , so take precautions.

If you can't avoid being outside and staying close to air conditioning, here are some ways to beat the heat:

-- Never leave your car locked or unattended without checking for pets and children inside.

-- Hydrate with water, avoiding sugary drinks and alcohol.

-- Wear light-colored clothing, which can hold down your body temperature several degrees.

-- Wear sunscreen SPF 15 or higher to protect your skin from harmful UV rays.

-- Don't forget to check on neighbors, friends and family, especially the young and the elderly, who are at more risk of heath damage from excessive heat.</s>WWJ – The heat is on along the west coast with record highs expected. Excessive heat warnings are in effect for parts of Arizona, California and Nevada with temperatures expected to peak at 117 to 122 degrees early this week.

Large cities such as Phoenix and Tucson in Arizona, Las Vegas in Nevada and Sacramento in California have already issued warnings on the heat wave that could last up to 10 days.

Multiple cities in the bay area of California already hit record high temperatures on Sunday and it’s expected to only get hotter.

“We’ve never seen these temperatures in the bay area and rarely see them in southern California,” San Francisco reporter Holly Quan told WWJ. “Southern California, though, they are expecting what they call unhealthy air in parts of San Gabriel Valley and the San Fernando Valley. They are telling people just don’t even go outside during the peak hours of the day. They just don’t want you outside, children and seniors (especially).”

Quan added that cooling centers are being set up for those who don’t have air conditioning.

“They are even telling you go to the movies, go to the mall, do something,” Quan said. “Don’t sit in your house because they are worried people will be complacent inside, close their drapes then it gets really (hot) and then bad things happen.”

According to Aljazeera, the overnight temperatures won’t drop like normal, leading to heat-related illnesses. Lack of overnight cooling is often the cause of heat-related illnesses.

In the meantime American Airlines is warning passengers that it may have to ground flights in Phoenix during the heat wave. The airline is letting Phoenix passengers flying during the peak heat today through Wednesday to change flights without a fee.</s>A brutal heat wave is expected to scorch the southwestern U.S. this week, with some cities likely to see all-time record high temperatures. The National Weather Service said this will likely be one of the most intense heat waves seen in many years across desert Southwest, including parts of California, Arizona, Nevada, and Utah.

Start the conversation, or Read more at Mashable.</s>PHOENIX (AP) – The first day of summer is forecast to bring some of the worst heat the southwestern U.S. has seen in years.

The forecast calls for 119 degrees in Phoenix, where some flights have been canceled because certain planes can’t take off in extreme heat.

Arizona is seeing the most stifling temperatures, but the wrath of the heat wave is being felt across Nevada and California as well.

Las Vegas was forecast to hit 117 (47 Celsius) on Tuesday and excessive heat warnings cover almost all of California.</s>Record-breaking temperatures that stoked a wildfire near Castaic Lake and other Southern California locations will continue to rise Monday and will peak on Tuesday, according to the National Weather Service.

In Palmdale, a 32-year-old heat record was broken on Sunday when temperatures climbed to 108 degrees. The thermometer is expected to climb even higher over the next two days however and the high-desert community is expected to wither under 109-degree heat Monday, according to meteorologist Tom Fisher.

It could reach 110 degrees on Tuesday, when the heat wave is expected to peak, he said.

The scorching weather is part of a system commonly referred to as the “Four Corners High,” a high-pressure system that settles over the desert Southwest near the Four Corners and spreads smothering heat from Northern California to Nevada and as far east as central Texas, Fisher said. The Four Corners is the area where Arizona, Utah, New Mexico and Colorado meet.

Fortunately for some, an on-shore breeze is keeping temperatures relatively cooler along the California coast. Temperatures will hover in the 80s downtown and will be even cooler the closer you are to the beach, Fisher said. Temperatures in the high desert are about 15 degrees above average, Fisher said, with the heat wave expected to cool a few degrees each day starting Wednesday.

That’s not the case in Sacramento Valley, however. The Weather Service estimates that triple digits there could last for a nine-day stretch, ending on Saturday. The record for consecutive days of triple-digit heat there is 11, set in 2006, the weather service said.

But in the meantime, the heat is drying out grass and brush that sprouted up and grew amid the wettest winter in years in California.

Over the weekend, Los Angeles County firefighters battled a fast-growing brush fire near Castaic Lake named the Lake Fire.

Two small structures were destroyed and about 800 acres have burned, authorities said. The fire was 60% contained Monday morning, Angeles National Forest tweeted. Crews were expected to spend the day mopping up hot spots and building containment lines to keep the fire from spreading further, the agency said.

In Riverside County over the weekend, firefighters tackled a 10-acre brush fire near Beaumont, a 40-acre fire near Moreno Valley and a 20-acre blaze just north of Lake Elsinore. In San Bernardino County, crews reported 70% containment on the Zermatt fire near Wrightwood, which consumed 11 acres.</s>Airlines cancelled flights in Phoenix and doctors urged people to be careful around concrete, playground equipment and vehicle interiors Monday as a punishing heat wave has descended on the Southwestern U.S., with the National Weather Service forecasting Tuesday highs of 48 C.

"That's deadly heat no matter how you slice it," weather service meteorologist Chris Breckenridge said.

Arizona is seeing the most stifling temperatures, but the wrath of the heat wave is being felt across Nevada and California as well. Las Vegas was forecast to hit 117 (47 Celsius) on Tuesday on the first day of summer, and excessive heat warnings cover almost all of California.

The heat is a serious public health hazard in places such as Phoenix and Las Vegas.

The county that is home to Phoenix had 130 heat-related deaths in 2016, the highest number in more than a decade. The Arizona Department of Health Services says nearly 2,000 people visit Arizona emergency rooms every year because of heat-related illnesses.

Homeless people comprised one-third of heat-related deaths in 2016, according to county records. Most of the others involved people with non-functioning air conditioners.

Kurt Dickson, an emergency room doctor at Banner Health in Phoenix, said people have a range of heat illnesses during the summer months, including fatigue, heatstroke and severe sun burns.

American Airlines have cancelled nearly 40 flights on Tuesday in Phoenix operated by regional jets because of the heat. The airline also said it will allow Phoenix passengers flying during the peak heat Monday through Wednesday to change flights without a fee.

American Airlines spokesman Ross Feinstein said the smaller regional jets flown by its partners can't operate once the temperature hits 47 C. That maximum is set by Bombardier, the manufacturer.

Larger airliners made by Boeing and Airbus have higher maximum operating temperatures, but airlines still need to closely monitor the weight of the jets during the heat.

Feinstein said the carrier began limiting sales on some flights to prevent the planes from exceeding maximum weight for safe takeoff in the hot conditions. Airlines can use other strategies for limiting weight during hot weather, such as not fueling completely, then making a refueling stop.

It gets so hot in Phoenix that stores put coverings over door handles so people don't burn their hands. Steering wheels and car shifters can be too hot to touch when getting into a car. And the pavement can burn the paws of pets.

The director of the Arizona Burn Center said second- and third-degree burns from touching hot items are common in the extreme heat. Dr. Kevin Foster warned people to be extra careful around concrete, car interiors and playground equipment, especially young children who have sensitive skin.

Pavement and concrete can be dangerous for pets, Foster said.

Phoenix and Las Vegas are used to 43 C heat, but temperatures above 46 C are rare.

Phoenix hit 118 F, or 47.78 C on Monday, tying the record for the date set last year.

The last time the city reached 120 (48.89 C) was in 1995. A notorious heat wave in 1990 brought consecutive days at 120 degrees, including the record of 122 (50 C).

The heat is spread across California. The Central Valley has been baking in unusually bad heat, and the Northern California city of Redding hit a June 18 record of 110 degrees on Sunday — over 7 C above normal.

It could be worse: Death Valley could see 51 C Tuesday.

Meanwhile, The Strip is often hotter than the rest of Las Vegas.

Weather service meteorologist Ashley Allen says the Strip's tall, close buildings and long stretches of concrete cause the area to heat quickly and cool slowly.

She says it's hard to predict exactly how hot the Strip will get because the weather service does not get official readings there, but temperatures could reach somewhere between 46 and 48 C.</s>PHOENIX (AP) — The Latest on an extreme heat wave in the Southwest U.S. (all times local):

American Airlines says seven regional flights have been delayed and 43 have been canceled because of a heat wave threatening to bring 120 degrees to Phoenix.

The disruptions came Tuesday. The airline says it doesn’t expect any more issues Wednesday but officials will re-evaluate.

The National Weather Service forecasts a high of 120 degrees (49 degrees Celsius), which is has only hit three times in recorded history — the last time 22 years ago.

Arizona is seeing some of the most dramatic temperatures Tuesday, but the heat wave is being felt across Nevada and California, too.

The first day of summer is forecast to bring some of the worst heat the southwestern U.S. has seen in years.

The forecast calls for 119 degrees in Phoenix, where some flights have been cancelled because certain planes can’t take off in extreme heat.

Arizona is seeing the most stifling temperatures, but the wrath of the heat wave is being felt across Nevada and California as well.

Las Vegas was forecast to hit 117 (47 Celsius) on Tuesday and excessive heat warnings cover almost all of California.</s>PHOENIX (AP) — A punishing heat wave has arrived in the Southwestern U.S. and brought temperatures that will approach 120 degrees in Arizona — a number not seen in the desert city in more than 20 years.

Arizona is seeing the most stifling temperatures, but the wrath of the heat wave is being felt across Nevada and California as well. Las Vegas was forecast to hit 117 on Tuesday on the first day of summer, and excessive heat warnings cover almost all of California.

Airlines canceled flights in Phoenix because the extreme heat makes it too difficult to take off. The major burn center in Arizona urged people to be careful around concrete, playground equipment and vehicle interiors. The National Park Service warned visitors to not to hike into the Grand Canyon because of excessive heat.

Despite the dangers, the heat may not be as bad as originally expected. The weather service had been forecasting Tuesday highs at 120 or 121 degrees in Phoenix for the past several days, but it now predicts 119.

“That’s deadly heat no matter how you slice it,” National Weather Service meteorologist Chris Breckenridge said.

Here are a few things to know about the heat wave:

Phoenix and Las Vegas are used to 110-degree heat, but temperatures above 115 are rare.

Phoenix has hit 118 degrees 11 times, most recently last summer. The last time it reached 120 was in 1995. A notorious heat wave in 1990 brought consecutive days at 120 degrees, including the record of 122.

Las Vegas is forecast to hit 114 on Monday and tie a record high of 117 degrees on Tuesday — last recorded in 2013.

The heat is spread across California. The Central Valley has been baking in unusually bad heat, and the Northern California city of Redding hit a June 18 record of 110 degrees on Sunday — 19 degrees above the normal.

It could be worse: Death Valley could see 124 degrees on Tuesday.

When the temperature soars, it’s harder for airplanes to take off.

As a result, airlines are taking the heat seriously.

American Airlines cancelled nearly 40 flights on Tuesday in Phoenix operated by regional jets because of the heat. The airline also said it will allow Phoenix passengers flying during the peak heat Monday through Wednesday to change flights without a fee.

American Airlines spokesman Ross Feinstein said the smaller regional jets flown by its partners can’t operate once the temperature hits 118 degrees. That maximum is set by Bombardier, the manufacturer. Larger airliners made by Boeing and Airbus have higher maximum operating temperatures, but airlines still need to closely monitor the weight of the jets during the heat.

Feinstein said the carrier began limiting sales on some flights to prevent the planes from exceeding maximum weight for safe takeoff in the hot conditions. Airlines can use other strategies for dealing with limitation on the planes during hot weather, such as not fueling completely to make the plane lighter for takeoff, then making a refueling stop.

Las Vegas visitors should be aware of a little-known fact about the temperatures in the gambling mecca: The Strip is often hotter than the rest of the city.

Meteorologist Ashley Allen with the National Weather Service in Las Vegas says the city’s airport is forecast to hit 114 on Monday, but temperatures on the Strip could reach somewhere between 115 and 120 degrees.

Allen says the Las Vegas Strip’s tall, close buildings and long stretches of concrete cause the area to heat quickly and cool slowly. She says it’s hard to predict exactly how hot the Strip will get because the Weather Service does not get official readings there.

It gets so hot in Phoenix that stores put coverings over door handles so people don’t burn their hands. Steering wheels and car shifters can be too hot to touch when getting into a car. And the pavement can burn the paws of pets.

The director of the Arizona Burn Center said second- and third-degree burns from touching hot items are common in the extreme heat. Dr. Kevin Foster warned people to be extra careful around concrete, car interiors and playground equipment, especially young children who have sensitive skin.

Pavement and concrete can be dangerous for pets, Foster said.

The heat is a serious public health hazard in places such as Phoenix and Las Vegas.

The county that is home to Phoenix had 130 heat-related deaths in 2016, the highest number in more than a decade. The Arizona Department of Health Services says nearly 2,000 people visit Arizona emergency rooms every year because of heat-related illnesses.

Homeless people comprised one-third of heat-related deaths in 2016, according to county records. Most of the others involved people with non-functioning air conditioners.

Kurt Dickson, an emergency room doctor at Banner Health in Phoenix, said people have a range of heat illnesses during the summer months, including fatigue, heatstroke and severe sun burns.</s>The first day of summer is being celebrated in the Southwestern part of the United States with a punishing heat wave that has caused flights to be canceled in Phoenix as doctors urge people to be careful around concrete, doorknobs, playground equipment and vehicle interiors due to the extreme temperatures.

The heat wave is threatening to bring 120 degree temperatures to several parts of Arizona, but the wrath of the extreme warm weather is also being felt across Nevada and California as well.

Las Vegas is likely to hit 117 degrees on Tuesday, as excessive heat warnings cover almost all of California.

The National Weather Service has been forecasting Tuesday highs at 120 or higher in Phoenix for the past several days, a number not seen in the desert city in more than 20 years.

'That's deadly heat no matter how you slice it,' weather service meteorologist Chris Breckenridge said.

Officials say when the temperature soars, it's harder for airplanes to take off. American Airlines canceled nearly 40 flights on Tuesday in Phoenix operated by regional jets because of the heat.

The airline also said it will allow Phoenix passengers flying during the peak heat Monday through Wednesday to change flights without a fee.

American Airlines spokesman Ross Feinstein said the smaller regional jets flown by its partners can't operate once the temperature hits 118. That maximum is set by Bombardier, the manufacturer.

Larger airliners made by Boeing and Airbus have higher maximum operating temperatures, but airlines still need to closely monitor the weight of the jets during the heat.

Feinstein said the carrier began limiting sales on some flights to prevent the planes from exceeding maximum weight for safe takeoff in the hot conditions.

Airlines can use other strategies for limiting weight during hot weather, such as not fueling completely, then making a refueling stop.

Phoenix and Las Vegas are used to 110-degree heat, but temperatures above 115 are rare.

Phoenix hit 118 degrees Monday, tying the record for the date set last year.

The last time the city reached 120 was in 1995. A notorious heat wave in 1990 brought consecutive days at 120 degrees, including the record of 122.

Furthermore, it gets so hot in Phoenix that stores put coverings over door handles so people don't burn their hands. Steering wheels and car shifters can be too hot to touch when getting into a car.

The director of the Arizona Burn Center said second- and third-degree burns from touching hot items are common in the extreme heat.

Dr. Kevin Foster warned people to be extra careful around concrete, car interiors and playground equipment, especially young children who have sensitive skin.

Pavement and concrete can be dangerous for pets, Foster warned.

The extreme heat is also spread across California, as the Central Valley has been baking in unusually bad heat.

The Northern California city of Redding hit a June 18 record of 110 degrees on Sunday, which is 19 degrees above normal.

Forecasters predict that Death Valley could see 124 degrees on Tuesday.

Officials in Nevada are warning visitors that the Las Vegas Strip is often hotter than the rest of the city.

Weather service meteorologist Ashley Allen says the Strip's tall, close buildings and long stretches of concrete cause the area to heat quickly and cool slowly.

She says it's hard to predict exactly how hot the Strip will get because the weather service does not get official readings there, but temperatures could reach somewhere between 115 and 120 degrees despite the city's airport forecast to hit 114 Monday.

Alan Schwandt was rushing to his second job of the day when his phone rang with another desperate Phoenix homeowner calling about a broken air conditioner in the midst of a scorching heat wave. Dressed in gray shorts and navy long-sleeve shirt emblazoned with his company's bright red logo 'Alan's Air,' Schwandt spent his day quickly crisscrossing the Phoenix metro area to bring relief to flushed residents. He toiled in temperatures close to 120 degrees, sometimes with one hand on his cell phone and the other on his tools. Residents who had just spent the night in a stifling home rejoiced when his work was done. Health officials with Maricopa County, which is home to the state's capital, say most heat-related deaths involve people with non-functioning air conditioners. During the summer, air conditioning repairmen are in hot demand. 'Sometimes you wish the phone would ring for more calls, and sometimes you hope the phone doesn't ring,' Schwandt said. 'This is probably the day you don't want it ringing because there's more work than you can do.' Alan Schwandt, an air conditioning repairman, examines a broken outdoor unit in Scottsdale, Arizona on Monday. Repairmen are constantly on call in the summer, as temperatures in the Phoenix metro area rise to nearly 120 degrees Schwandt said he knew early Monday that it was going to be busy thanks to the extremely hot temperatures. He is pictured above climbing down a ladder to grab supplies from his truck while fixing a rooftop unit in Tempe, Arizona on Monday Schwandt knew early Monday that it was going to be busy. The temperature was expected to peak at 118 degrees and calls were already coming in. As a child in Florida, Schwandt watched his father work as an air conditioning repairman. When he was grown, he went to school to learn the trade and started his own company in 1978. He said he hasn't advertised in 20 years, garnering service purely from word of mouth and online reviews. Monday morning started in Scottsdale - a Phoenix suburb - with a longtime customer who had called the night before. Russ Goodman said the temperature in his house had risen to 89 degrees by the time he went to bed. Russ Goodman, 72, checks on the vents as cool air once again flows through his home in Scottsdale, Arizona on Monday after his air conditioning unit was repaired 'Just in case the whole thing went caput, I'm all set: I have a villa reserved at the hotel,' Goodman said Monday as Schwandt and a technician, Mike Miller, examined the air conditioning unit. Schwandt determined they needed to swap the capacitor, which acts like a battery and boosts the heart of the cooling cycle inside the machine. Twenty minutes later, Goodman gleefully put his hand up to a vent relishing the cold air. 'These are like the unsung heroes - the people that keep my life going,' he said.

Officials say the heat is a serious public health hazard in places such as Phoenix and Las Vegas.

The county that is home to Phoenix had 130 heat-related deaths in 2016, the highest number in more than a decade.

The Arizona Department of Health Services says nearly 2,000 people visit Arizona emergency rooms every year because of heat-related illnesses.

Homeless people comprised one-third of heat-related deaths in 2016, according to county records. Most of the others involved people with non-functioning air conditioners.

Kurt Dickson, an emergency room doctor at Banner Health in Phoenix, said people have a range of heat illnesses during the summer months, including fatigue, heatstroke and severe sun burns.

Dr. Moneesh Bhow, medical director for Banner University Medical Center Emergency department, said the body's internal cooling mechanisms are ineffective when temps reach above 110 degrees.

One of the ways the body cools itself is by radiating heat through the skin into the air, but that system reverses when external temperatures climb to 110 or higher.

'When that happens we have to rely on our second mechanism, which is sweating,' Bhow said. Sweat makes your skin feel cooler and some heat is removed as it evaporates.

He noted staying hydrated is crucial to perspiring and staying cool.

In addition to the heat wave gripping the Southwestern part of the country, Gulf Coast states are preparing for a powerful weather system of their own.

A tropical storm warning has been issued for a section of Louisiana's coast as a weather system approaches from the Gulf of Mexico.

The warning is in effect from Cameron, Louisiana, to Intracoastal City.

The system's maximum sustained winds early Tuesday are near 40 mph. The U.S. National Hurricane Center says some slight strengthening is possible before the system reaches the coast, either late Wednesday or Wednesday night.

As of 5am Tuesday, the system is centered about 305 miles south-southwest of the mouth of the Mississippi River and is moving northwest near 8 mph.

Meanwhile, Tropical Storm Bret is moving along South America's northern coast. Its maximum sustained winds are near 40 mph with weakening expected to begin later in the day.
A heat wave strikes the Western U.S. states of Arizona, California, and Nevada. It is predicted to last until June 23.