From hot to hotter: Heat wave settles in Midwest

While the temperature hovers in the 90's, boys enjoy using a swing rope to cool off in the Suwannee River near Chiefland, Fla., Thursday, July 14, 2011.
AP Photo

INDIANAPOLIS — Sizzling heat baked much of the Midwest today, with temperatures at triple-digit levels in some states, and heat advisories commonplace across a wide swath of the country.

Temperatures ranged to 15 degrees above normal highs in many states as a high pressure system settled in. Forecasters say the very hot weather would continue throughout the weekend, and some of it is likely to be felt in the mid-Atlantic and eastern seaboard states, by early next week.

Not even the Northeast was spared today's stifling heat.

Between 20 and 30 spectators at an air show in upstate New York were treated for heat-related emergencies, and some were hospitalized for further treatment.

An official at the Greater Rochester International Airport told a newspaper that most of the stricken people suffered from dehydration.

Across much of the country's midsection and to the east, officials reminded people to drink plenty of fluids and stay in the air-conditioning as much as possible.