A heat wave, which is counted when the maximum temperature sees a departure between 4.5 degrees to 6.4 degrees, is expected to stay for two to three days ahead, causing much discomfort.

Millions across the U.S. Northwest will face unseasonably hot temperatures that could challenge or break records across multiple states this weekend as a heat wave moves into the area.. National ...

LOS ANGELES – A heat wave is set to inflict misery on nearly the entire length of California starting Friday.

Temperatures are expected to soar into the high 20s through the weekend across Metro Vancouver, as the first sustained heat wave of the year settles into the B.C. South Coast. Although it was 28 C ...

LOS ANGELES — A heat wave is set to inflict misery on nearly the entire length of California starting Friday. Triple-digit heat is expected up and down the state, pushing record-level ...

For the first time since last fall, middle Tennessee will see three consecutive days in the 90s. Does this count as a heat wave, or is this normal for this time of year?

Nearly 400 Missourians died from an extreme heat wave in 1980. The effects are still felt across St. Louis, Missouri and the nation.

SHORT TERM: Heat wave continues through Thursday and Friday with heat index values above 100° at times; LONG TERM: Storm chances cross into the likely category Saturday and Monday, only a minimal ...

Stifling conditions are settling into the Pacific Northwest and Columbia River Basin to start the week, with triple-digit temperatures and readings flirting with records. The brief but intense ...

The Egyptian Meteorological Authority (EMA) expects temperatures to continue rising across most parts of the country on Monday, with very hot conditions during the day in Greater Cairo, Lower Egypt, ...