Forecasters say people should limit outdoor activity during the hottest portions of the day, wear lightweight clothing, drink plenty of water and be watchful for signs of heat exhaustion, which include heavy sweating, pale and clammy skin, weak pulse, fainting and vomiting.

CNN: Heat advisories issued to states dwindles to 15

The National Weather Service advises residents to wear lightweight and loose-fitting clothing, drink plenty of water, take frequent breaks in shaded or air-conditioned environments, stay out of the sun and check on relatives and neighbors.

CNN: Heat wave sweeps across U.S. Northeast