Summer will make a dramatic entrance in the U.S. this week with a heat dome that will bring stifling temperatures and uncomfortable humidity to millions.

A Midwest heat dome will bring worryingly high temperatures and stifling humidity to millions of people this weekend.

Life-threatening heat wave in the Midwest and Northeast to kick off official start of summer High temperatures expected to range from the mid-90s to the low-100s.

Canadian wildfire smoke worsens air quality in Midwest US cities. Minnesota and Wisconsin face 'very unhealthy' conditions this week.

Smoke from Canadian wildfires causes hazy skies across the Midwest, affecting air quality in the Dakotas, Minnesota, and Ohio.

A wide swath of the Midwest and Plains states is under a tornado watch and severe weather conditions are forecast to persist into next week, the National Weather service said Thursday.

Go here for the latest on the storms. A strong storm system coming out of the Great Plains brought severe thunderstorms to the Midwest on Thursday, including a reported tornado that swept through ...

At least 9 million people in the nation's upper Midwest region are under red flag warnings on Monday.

MINNEAPOLIS (AP) — Storms with lightning and hail and at least one observed tornado were moving through the upper Midwest on Monday with the potential for strong tornadoes.

Animated weather footage highlights the areas most at risk for large hail, damaging winds and strong tornados on Monday night.