As a summer heat wave sweeps through the region, air conditioning systems are being pushed to their limits, and some are failing.

With this week's heat wave likely leaving conditions feeling like it is more than 100 degrees on Tuesday, Massachusetts could see another big change to the forecast before the week ends.

It's easy to lose your appetite when it's too hot out. But eating the right foods will help you beat the heat.

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.

Washington area residents are going to experience a sweltering first half of the week, as an extreme heat alert is in effect until Thursday morning. Feels-like temperatures will exceed 100 degrees during the daytime on Monday through Wednesday.

Scientists warn of more extreme temperatures both during the day and at night in Tennessee. Here's when we could see some relief.

Everyone knows that cars can heat up fast in a parking lot, especially in high temperatures, like the heat wave that's blanketing the Commonwealth right now.

Illinois' number one music festival is set to take over Chicago's Grant Park this weekend, with Lollapalooza's star-studded lineup drawing crowds in the hundreds of thousands. The festival is only three days away, scheduled to kick off on July 31 and wrap up on August 3.

New York City is bracing for the start of a potential heat wave beginning today, with city officials and weather experts urging residents to take precautions as temperatures rise.