The heat is on, and it will be sticking around through the Fourth of July weekend. Wednesday is expected to be the first day of a heat wave that will likely last into, if not through, the July 4 holiday weekend,

More dangerous heat is on tap for Southern California starting Friday, with forecasters warning of elevated risks of heat illness and large wildfires.

Most of the U.S. is about to swelter under an unusually large, strong and long-lasting heat dome. The heat wave is set to start this weekend and last at least a week.

A prolonged, dangerous heat wave will intensify across most of the central to eastern U.S. this week, the National Weather Service said.

When water no longer makes things wet: During long heat waves, garden soil loses its ability to absorb water. Find out what earthworms, bacteria, and fungi have to do with it here. During a heat wave,

A dangerous heat wave is tightening its grip on the East Coast and straining the electric grid as people seek to cool off in their air conditioned homes and businesses. The worst conditions are now underway,

Heat can be dangerous, but health experts say there are ways to manage the threat. Scorching temperatures, especially combined with high humidity, pose risks particularly for children, older people and those with certain health conditions. Anyone can ...