Mayor Aftab Pureval declared an emergency while the city of Cincinnati and Metropolitan Sewer District assess flood damage.

A tornado watch is in effect through the entire evening to midnight for more than half of the Upper Peninsula. Severe thunderstorms should erupt quickly this evening over the western U.P. and move east-southeast through midnight.

The threat of severe thunderstorms, flash flooding and damaging winds affecting the Lehigh Valley and surrounding areas Tuesday has increased, according to the National Weather Service in Mount Holly,

A tornado watch for the Philadelphia region expired Tuesday night after severe storms moved across the Delaware Valley.

A tornado watch is in effect until 10 p.m. for much of central and eastern Iowa. See the storm threats and how to prepare.

A tornado touched down in the Valley Tuesday evening, continuing a trend of severe weather for the month of July.

Severe weather has been impacting the entire region on Tuesday, with watches and warnings throughout the CBS News New York viewing area.