Much of the U.S. is under extreme heat warnings or advisories while New York, Philadelphia and Washington could feel like 100 degrees or more.

A June controversy over the lack of air-conditioning inside Delaware's largest prison caught the governor's ear and sparked claims of retaliation.

TODAY: Isolated storms are possible, but coverage and relief will be very limited. Much of the area will be dangerously hot, ...

Heat and humidity will build across West Michigan over the next few days, with heat index values near 100. Get the latest forecast from the FOX 17 Weather Ready team.

Environment Canada says a multi-day heat event for parts of Ontario and Quebec is set to begin on Sunday with a humidex that ...

A heat wave that was slightly interrupted by thunderstorms in parts of the D.C. region Saturday, returns Sunday.