A man and his 3-year-old son are dead and another child is in critical condition after what police believe was a tragic accident in Valley Station. 
 
 Metro police responded to the 9900 block of Plaudit Way on Wednesday morning after a family member found the three in the family's garage. 
 
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 Investigators believe the father turned on the car to warm it up while it was in the garage and that all three people were poisoned by carbon monoxide. 
 
 "This could happen very, very quickly, and it did, in this case," LMPD Lt. Emily McKinley said. 
 
 The three were found by a family member, who called 911. 
 
 When first responders arrived, they found all three unresponsive in the closed garage. 
 
 Juvenal Garcia Mora, 39, and Cruz Isaac Garcia, 3, were pronounced dead in the emergency room at the Medical Center Jewish Southwest. Their causes and manners of death are pending. 
 
 Police closed down streets and escorted an ambulance carrying a 7-year-old girl to Norton Children's Hospital. The girl was last said to be in critical condition. 
 
 McKinley said police hope the tragedy will serve as a reminder to people of the dangers of carbon monoxide. 
 
 
 
 “I know it's the winter months and everyone wants a warm car to get into, but be cautious of the areas and make sure it's a well-ventilated area, because horrible accidents happen like this, and they happen very quickly,” she said. 
 
 The mother of the two children was not home at the time of the incident, but police have notified her. 
 
 McKinley said they don't have reason to believe the incident was anything other than a tragic accident, but they are still investigating the deaths. 
 
 Carbon monoxide is a colorless, odorless and tasteless gas. 
 
 It's lighter than air and spreads quickly. 
 
 Symptoms of carbon monoxide poisoning often mimic the flu -- and include headaches, nausea and dizziness. 
 
 In high concentrations, carbon monoxide can be deadly in less than five minutes. 
 
 AlertMe ||||| Inside a snow and iced packed car in Passaic, New Jersey a mother, 23-year-old Sashalynn Rosa, and her one-year-old, Messiah took their last breaths as carbon monoxide filled their vehicle."It's hard to lose them like that," says boy's grandfather, Felix Bonilla.His son, Felix Bonilla, Jr. had been digging out the family's car Saturday night while his girlfriend and their two children sat inside to stay warm. With the car's engine on, and its tail pipe clogged by snow, the odorless, invisible gas seeped into the car in minutes, killing the mother and her baby boy. The little girl also unconscious, was kept alive by paramedics and a bystander who was not afraid to get involved."I tried to help the girl, and I put my mouth in. Girls and paramedics worked so hard, so hard to save the kid," said eyewitness Isabel Carmona.The little girl, Saniyah remained in very critical condition at a hospital in Paterson on Monday.Her grandfather is hanging on to a thread of hope she may survive."The doctors say they don't think she's going to make it. Doctor says she has a slight chance to make it," says Bonilla.Friends say the father, when not working at his job at a restaurant depot, spent all his time with his children. Eyewitness News told he's been by his surviving child's bedside ever since the tragedy. His father says his son is devastated."And my son. He's not doing good. Real bad," adds Bonilla.The mother and child are the only deaths in New Jersey attributed to the storm. Carbon monoxide is a silent killer that strikes quickly and with little warning.Police say the tragedy is a reminder to people to make sure their tailpipes are free and clear because it doesn't take long for cars to fill up with carbon monoxide."Any snow that covers your tailpipe you want to shovel the snow from the back of the car and clear the tailpipe before you even start the car," said Battalion Chief Chris DiBella, Passaic Police Department.
– A heartbreaking story out of Kentucky, where a father and his 3-year-old son died of apparent carbon monoxide poisoning Wednesday morning; the man's 7-year-old daughter is in critical condition. Juvenal Garcia Mora, 39, was found unresponsive inside his garage but not in his car; the children were inside the car. "It appeared to be that he had warmed the car up while it was in the garage, and trying to get the kids out the door to school and start the day," a police rep tells Fox 19. The children's mother had already left for work at the time. Relatives, concerned when Mora didn't show up at work and his daughter didn't arrive at school, went to the house and then called police. The police rep, who said the situation appears to be a "horrific accident," notes that it's a sad "reminder in the cold months to be cautious of running vehicles inside of closed, indoor areas, specifically garages," as that can lead to carbon monoxide poisoning. In high concentrations, the colorless, odorless, tasteless gas can be fatal in five minutes, WLKY reports. "This could happen very, very quickly, and it did, in this case," the police rep says. (Carbon monoxide was also suspected in the deaths of six teens in a garden shed.)