Over the past 24 hours, more than 40 reported tornadoes have swept across eight states in the Midwest and South -- and the dangerous severe weather threat continues. The eight states with reported tornadoes in the past day are Alabama, Missouri, Arkansas, Mississippi, Louisiana, Illinois, Indiana and Tennessee.

A monster storm sweeping through parts of the U.S. whipped up tornadoes and dust storms and sparked wildfires, killing at least 34 people across six states, according to reports. The massive storm system with winds reaching 80 mph was forecast to sweep through an over 100 million-strong area from the Canadian border to Texas,

In some extreme cases, thunderstorms can spawn a derecho, a long-lived windstorm with gusts over 100 mph, strong enough to cause widespread destruction. If a severe thunderstorm warning mentions damaging winds or a derecho, take cover immediately—just as you would for a tornado.

Meanwhile, the severe weather threat will linger through Sunday from Florida northward into the upper Ohio River Valley, forecasters warned.

Violent tornadoes and high winds decimated homes, wiped out schools and toppled semitractor-trailers as a monster storm that killed at least 32 people ripped its way across the central and southern U.

Eight people were killed in Kansas after the weather front brought high winds and a dust storm Friday afternoon, lowering visibility and causing a pileup involving dozens of vehic

Residents are surveying damage from unusually vicious weather in multiple U.S. states where violent twisters, blinding dust storms and fast-moving wildfires decimated entire neighborhoods.

"Get to the sturdiest structure you have access to and remain in place until the storms pass," the NWS told residents in Alabama on Saturday night, when multiple tornado warnings were issued. At least 250,