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NEW YORK - AUGUST 02:  A thermometer in the sun on the sidewalk indicates a temperature of 120 degrees Fahrenheit as people eat ice cream on the Upper West Side August 2, 2006 in New York City. Forecasters have called for high temperatures of 100 degrees in the city with the heat wave continuing through tomorrow.  (Photo by Chris Hondros/Getty Images)
NEW YORK - AUGUST 02:  A thermometer in the sun on the sidewalk indicates a temperature of 120 degrees Fahrenheit as people eat ice cream on the Upper West Side August 2, 2006 in New York City. Forecasters have called for high temperatures of 100 degrees in the city with the heat wave continuing through tomorrow.  (Photo by Chris Hondros/Getty Images)

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    Deadly heat wave scorches U.S.

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Deadly heat wave scorches U.S.

Dangerous heat waves are gripping the United States, with 12 states under heat watches or warnings. CNN's Chad Myers has more.

Deadly heat wave scorches U.S.

Dangerous heat waves are gripping the United States, with 12 states under heat watches or warnings. CNN's Chad Myers has more.