(AP) -- Americans in much of the country will be getting a slight break from the oppressive heat, one day after temperatures rose to above 100 degrees from the central states to the mid-Atlantic. Yet for many, the cooler temperatures won't exactly be comfortable, falling only into the 90s.

Cooler air is sweeping southward in the eastern half of the country on Sunday, bringing down some temperatures by 15 or more degrees from Saturday's highs. In St. Louis, the 13-degree drop still will leave residents baking in 93-degree weather - the high Saturday was a record 106.

Temperatures in Philadelphia, Washington, and Indianapolis will fall to the low 90s or upper 80s after crossing 100 on Saturday. Louisville residents can expect a high of 95, a day after hitting 105.

For many areas, the cooler temperatures were ushered in by thunderstorms that knocked out power to thousands.

At least 30 deaths have been blamed on the heat.  The heat also is blamed for more than 30 deaths across the country. A 4-month-old girl died and a 16-month-old girl was hospitalized Saturday in separate incidents in suburban Indianapolis when both were found trapped in cars during near-record 105-degree heat.

For more coverage on the heat wave, click here 

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