Heat wave

Children play in water sprayed from a fire hydrant on June 9, 2011 in the Bronx borough of New York City. An early summer heat wave has hit the city with temperatures forecast to hit in the high nineties this afternoon.

wading pool on street — AP Photo/Matt Slocum

Tyler Makarewicz , 3, left, and neighbor Jeweliana Kilpatrick, 7, play in a wading pool as Tylers' father, Stanley Wakarewicz supervises, June 9, 2011, in south Philadelphia.

man cools down in a fountain — AP Photo/Steve Ruark

Robert Blankenship of Baltimore cools down in a fountain, June 9, 2011 in Baltimore.

A mailman shields himself from the heat with a towel over his head as he delivers mail in northeast Washington, June 9, 2011.

Casey Vanderpot cools off during the opening day of the Bonnaroo Music — AP Photo/Dave Martin

Casey Vanderpot of Boxford, Mass., cools off during the opening day of the Bonnaroo Music Festival in Manchester, Tenn., June 9, 2011.

A New York City police officer wipes sweat off his forehead while standing guard outside the Armed Forces career center, June 9, 2011 in New York's Times Square.

Seniors spend time near a fan at Waxter Senior Center, June 9, 2011 in Baltimore. The center was designated as a cooling station by Baltimore officials.

chld puts her feet in the fountain at the National Gallery of Art — Getty Images/Mark Wilson

Ronja Lerche, 2, of Erfurt, Germany, puts her feet in the fountain at the National Gallery of Art Sculpture Garden, on June 9, 2011 in Washington, DC. A heat advisory is in effect for the Washington area, and temperatures are expected to be in the middle to upper 90s this afternoon.

Alan Bogoricin from Brazil practices yoga in Central Park on June 9, 2011 in New York City. An early summer heat wave has hit the city with temperatures forecast to reach the upper 90s this afternoon.

man cools off in a fountain — Getty Images/Mark Wilson

Gilles Werle, visiting from Strasbourg, France, cools off in a fountain along the Hudson River Greenway, June 8, 2011 in New York.

A construction worker drains a bottle of water while assembling scaffolding outside a Midtown office building, June 8, 2011 in New York.

A recycling bin is full of discarded water bottles on the National Mall in Washington, June 8, 2011. The mercury climbed into the 90s across half the country Wednesday in a record-breaking blast of August-like heat, forcing schools with no air conditioning to let kids go home early and cities to open cooling centers.

sunbather basks in Bryant Park — Getty Images/Mark Wilson

A sunbather basks in the hot sun of Bryant Park, June 8, 2011 in New York. Temperatures climbed well in to the 90's Wednesday as New York was hit by a heat wave, its first of the season.

Maria Mejia cools off in a water fountain in Washington, June 8, 2011.

two Labrador Retriever splash around — Getty Images/Mark Wilson

Labrador Retrievers named Faith and Luke splash around while tugging over a stick tossed by their owner Debra Nessing of Vernon CT., June 8, 2011, as they cool off from temperatures that reached into the 90's, at Bolton Lake in Bolton, CT.

Ron Krajewski of San Diego, Calif., pushes his son on a stroller through a water sprinkler to cool off from the simmering heat on the National Mall in Washington, June 8, 2011.

people take sheler beneath the shadow of the Washington Monument — Getty Images/Mark Wilson

Under a strong sun, people take shelter beneath the shadow of the Washington Monument on the National Mall in Washington, June 8, 2011.

child plays in a water fountain — Getty Images/Mark Wilson

Alexander Reyes, 11, plays in a water fountain in Washington, June 8, 2011. The official start of summer is still two weeks away, but much of the nation was sweating through near-record temperatures, with heat advisories and warnings issued across the Northeast, mid-Atlantic and upper Midwest.

Allie Marsinko cools off from the simmering heat — Getty Images/Mark Wilson

Allie Marsinko, 5, of Connellsville Pa., cools off from the simmering heat running through a water sprinkler on the National Mall in Washington, June 8, 2011.

Henny Van Marsbergen drinks water while holding an umbrella for shade outside of Yankee Stadium before a baseball game between the New York Yankees and the Boston Red Sox, June 8, 2011.

Cheri Herschell, right, holds her 20-month-old son Wyatt Herschell as he splashes and plays with a ball at the Edco Park pool in Evans City, Pa.