Summer has gotten hotter nearly everywhere: See where it's worst

U.S. summers are heating up fast, and a new study shows nearly every major city is hotter than in 1970, with extreme heat risks on the rise.

Enhanced Fujita Scale; how National Weather Service ranks tornadoes

Tornadoes are categorized on what is called the Enhanced Fujita Scale or EF Scale. This became operational on February 1, 2007.

Hail damage from Thursday thunderstorms keeps people busy

Severe thunderstorms thrashed southeast Wisconsin on Thursday, leading to large hail in some areas and tornadoes in others.

Dodge County tornadoes, NWS confirms 4 touched down Thursday

The National Weather Service has confirmed four tornadoes touched down in Dodge County on Thursday night, May 15.

Wisconsin storm damage: Mayville, Juneau face long road ahead

The National Weather Service surveyed storm damage in Juneau and Mayville on Friday after officials said likely tornadoes tore through the communities.

Wisconsin severe thunderstorm warnings expire Friday

The National Weather Service issued a severe thunderstorm warning for Jefferson and Waukesha counties on Friday afternoon.

Racine Zoo storm damage, closed Friday as crews clear debris

In Racine County, strong winds snapped power lines and downed trees along the lakefront during Thursday's storms. Even the zoo took a hit.

Watch: 'Fog tsunami' rolls over Lake Michigan

Stunning video captured by a Michigan photographer shows a giant fog wave rolling over Lake Michigan as a storm approached.

Dodge County storm damage, residents asked to shelter in place

The Dodge County Sheriff's Office said residents in the Juneau and Mayville areas have been asked to shelter in place on Thursday night, May 15.

Wisconsin hail size reports; severe weather Thursday, May 15

The National Weather Service collected hail size data from the severe weather system that rolled across the region on Thursday, May 15.

Wisconsin tornado warnings, watches expire Thursday

National Weather Service tornado warnings and watches for southeast Wisconsin have now expired on Thursday, May 15.

4.1-magnitude earthquake hits Tennessee, felt in Atlanta

A 4.1-magnitude earthquake struck Tennessee Saturday morning and was felt as far as Atlanta and western North Carolina.