A storm system blamed for a path a destruction across the Midwest is now heading to the Northeast.
Forecasters said it's a giant line of ferocious storms that spawned 17 tornadoes Wednesday.
In Iowa, businesses and homes were among the worst casualties of a series of tornadoes, including a restaurant that was completely destroyed.
In some areas of Ohio high winds caused by possible twisters knocked out power.
The Chicago White Sox baseball game was postponed due to severe weather.
In nearby Indiana, golf-ball sized hail damaged numerous cars.
Forecasters had upgraded the risk of storms to its highest level for parts of the Midwest overnight, which was the first time this year.
"A high risk is just off the charts. That's when we're really sounding the bell as loudly as we can to let folks know they really need to pay attention," National Weather Service meteorologist Ed Fenelon said.
More damage and possible flooding is expected Thursday in the Mid-Atlantic and Northeast.