Millions of Americans across 22 states have been urged to stay out of the sun today as heat index temperatures for almost half the country soar into the triple digits.

A heat advisory is in effect in Boston and several other Massachusetts communities through 7 p.m. on July 17. The National Weather Service warned of "dangerous heat and humidity" with heat indices ...

New York City remains under a heat advisory Thursday, as high temperatures hit the 90s and feel more like triple digits. The ...

Yahoo News used data from the National Oceanic and Atmospheric Administration to calculate the number of days in each county ...

The National Weather Service is understaffed. What it means for Florida. | Opinion We cannot afford to let the National Weather Service languish. This agency gives us some of the best bang for the ...

Raising the temperature on your thermostat while you're away, even by a few degrees, can help save energy and money without causing your AC system to work extra hard when you return home. Turning the ...

The National Weather Service has issued a severe thunderstorm watch for four New Jersey counties on Thursday afternoon, along with parts of eastern Pennsylvania.

Many states will experience temperatures that feel in the triple digits on Thursday, forecasters say.

Should you set your a/c to 78 when it's hot out? Which temperature is the safest and most cost-effective? That depends on you.

NEW YORK (AP) — Extensive triple digit heat, broken temperature records and oppressive humidity piled up into a steaming mess as the heat dome crushing the Eastern half of the nation sizzled to ...

The temperature in New York City has reached 100 degrees as the eastern U.S. sweltered under an extreme heat wave.