Central Florida faces a sweltering night Monday with lows near 80 degrees and heat index values still in the 90s, followed by another dangerously hot day Tuesday with heat index values expected to soar as high as 118 and only limited relief from scattered afternoon storms.

Dangerous conditions continue across Florida Tuesday, July 29, with most of the state under either extreme heat warnings or heat advisories.

The National Weather Service has issued a heat advisory for Rhode Island and other parts of Southern New England.

Blazing heat and humidity will send temperatures soaring into the mid to upper 90s. Feels like temperatures at 100°+

Severe thunderstorms could continue into July 29, bringing havoc to morning commutes in Chicago, Milwaukee and Indianapolis.

Heat stroke differs from heat exhaustion in two major ways, Smurawa said. Heat stroke involves a dangerously high core body temperature — typically 104 F or more — and can impair the central nervous system. This means a person may become disoriented, confused or, in severe cases, experience seizures or even coma.

A heat advisory in place today for the Pittsburgh area with temperatures expected to reach the 90s with heat indexes in the 100s. Any Alert Days Ahead? Due to the Heat Advisory issued by the NWS we have made today a First Alert Weather Day. Could potentially have another one in place Wednesday.

More than 250 million people in the U.S.—nearly three quarters of the population—are experiencing moderate, major or extreme risk of heat effects on July 28, according to the National Oceanic and Atmospheric Administration’s National Weather Service.