Dangerous heat will be followed by storms with damaging winds that could hit 65 miles per hour as a frontal system nears the Northeast. Heat-index values (combination of the temperature and humidity) on Friday,

Chicagoans are stepping up to help one another during another heat wave in the city. The temperature reached 94 degrees Wednesday, with a heat index of 105, according to the National Weather Service. An extreme heat warning is in effect through much of Thursday, when temperatures are forecast at a high of 94 and a heat index of 103.

The Pensacola area is under a heat advisory for the second day in a row. A cluster of showers and thunderstorms will offer relief on Wednesday.

Aside from the heat, scattered showers and severe storms arrive after 3 p.m. to 8 p.m. The main severe threat will bring damaging winds, alongside heavy downpours. Saturday will be another hot and humid day, with heat indices near 90. TONIGHT: Mostly clear, warm and sticky. Lows near 73.

How is the heat index calculated, and why is it more important than the air temperature during some heat waves?

Individuals can expect to feel triple-digit temperatures all over the Lowcountry this weekend into Wednesday next week.

Extreme heat is back with temperatures expected soar past 90 degrees Thursday, according to Jared Rackley, a meteorologist with the National Weather Service in Moon. Pockets of the region could see a

Heat index PEAKING this afternoon at 105° in Indianapolis. This is the 5th day this summer with a heat index of 100° or higher and the HIGHEST so far. PEAK HEAT INDEX thus far Thursday: 114°