A dangerous heat wave continues across a large part of the United States, with more than 130 million people under extreme heat watches and warnings from South Dakota to Florida.

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.

A heat advisory will be in effect for all of north Alabama until 9 p.m. Tuesday. The National Weather Service in Huntsville said the heat index could go as high as 109 across north Alabama both this afternoon and Tuesday.

A heat advisory has been issued for Monday, Tuesday and Wednesday for heat indices forecasted to reach 100 degrees for the first half of the week.

Extreme heat may make people sick in North Carolina. Here's how to avoid heat illness when it feels like 105-110 degrees Fahrenheit outdoors.

Forecasters warn of 100- to 105-degree heat index values through Tuesday, with potential storms offering limited relief.

Heat safety is about more than just the temperature. When the heat index is high, it means that our bodies also struggle to keep us cooled off.