A man pushes a cart of bottled water down Broadway during warm weather on July 6, 2012 in New york City. People lie on the beach at Coney Island in the New York City borough of Brooklyn, June 30, 2012. About 3.9 million homes and businesses were without power amid a record heat wave in the eastern United States after deadly thunderstorms downed power lines from Indiana to New Jersey. Swimmers try and keep cool in near 100 degree temperatures at Red Oaks Waterpark in Madison Heights, Mich., June 28, 2012. David Romero, age 10, reaches for streams of water at a play fountain in Columbia Heights in Washington, D.C., June 29, 2012. Kids play in a pool on a street in Philadelphia, June 20, 2012. Temperatures climbed toward the high 90s along the Eastern Seaboard as an unusually early hot spell heralded the official start of summer. A sun bear reacts to triple-digit temperatures at the Henry Doorly Zoo in Omaha, Neb., Friday, July 6, 2012. At the Minnesota Zoo, a grizzly bear from the Russia's Grizzly Coast Exhibit took to the water to stay cool in afternoon heat, July 2, 2012. People enjoy the hot weather at Brighton Beach in New York City, June 21, 2012 Rocko Van Bommel, 13, left, leads a group of fellow Lake Worth junior lifeguards during a paddle board drill in Lake Worth beach, Fla., July 5, 2012. A girl waits for a customer at the "Lickity Split" ice cream wagon during an Independence Day parade, July 4, 2012 in Centerville, Tex. People watch the sunset from a ferry on the East River in New York City, June 21, 2012. Unionized Consolidated Edison workers protest in front of the company's offices in New York City, July 2, 2012. New York City utility workers locked out by Consolidated Edison asked for federal mediators to step into labor talks, as a series of small power outages raised the specter of major blackouts in America's biggest city ... during a heat wave. A man relaxes on a small beach along the East River during a record breaking heat wave, June 21, 2012 in New York City. Children play in a fountain in Battery Park in New York City, June 21, 2012. Graham Gallaway shields himself with a hat as he picks green beans under the hot sun at Piedmont Biofarm in Pittsboro, N.C., June 29, 2012. Matt Fouse waters his wilted backyard garden by flashlight and moonlight, in the 3200 block of Abell Avenue, which was left without electricity after severe storms in Baltimore, June 30, 2012.