Deadly Powerful Storms Spark Evacuations and Warnings to Get Off the Streets

20 million in the path of storms; one father killed while at a fair; and flooding causes officials in Tampa to warn residents to stay home.
2:50 | 08/04/15

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Transcript for Deadly Powerful Storms Spark Evacuations and Warnings to Get Off the Streets
It now to the other urgent headline at this hour those evacuations underway right now and warnings to get off the streets. With the powerful storm system on the move at this hour tens of millions of Kentucky all the way to Maine and the path and EF one tornado. This is outside never built Iowa 100 mile per hour winds but daily news tonight in Tampa Florida cars under water and meet those warnings. And watch this time lapse a powerful storm moving in over Montrose beach Illinois it's the same system. It caused a deadly tent collapse near Chicago as we get word at this hour of yet another tent collapse this time in New Hampshire. And there are reports tonight of several injuries we have it all beginning with the city underwater here's ABC's Jupiter Venus. Tonight strong winds moving through New Hampshire causing attempt to collapse at fairgrounds in Lancaster several injured police say at least 250 people were under that tent. At the time of the collapse of Tampa Florida inundated. Torrential rains forcing dozens of rescues some by boat some carried out on shoulders. More than forty residents evacuated from flood waters up to four feet I've never seen it like this matter further north deadly storms moving east. After tearing up the midwest this scene of the summer festival just outside of Chicago defense thing just belief that the damage here people were here trying to enjoy. A former affable when take a look a tent came crashing down. Killing a fault or to the 35 year old family right there when tragedy struck cane so fares. And I that he was steering you like yeah. That I can't handle. In Allendale Michigan and EF one tornado with ninety mile per hour winds. Hitting hard and fast another confirmed tornados in crescent Iowa. And in Gray's lake Illinois a tornado tearing the roof off of a high school. Think fully it was empty. And just miles away that same tornado hitting this pizza shop in just take a look it is completely destroyed. The owner tells us there were customers inside when that storm hit but amazingly David. None of them. Or injure him that's incredible and good news GO thank you let's get right to meteorologist rob Marciano because they were saying these fires at least one of them tripling in size just this weekend alone incredible the heat to dry air there but finally got a bit of a change in the weather pattern one we've been waiting for a shift of that. Hot dry ridge to the east that will least bring in some cooler Pacific care not a whole lot of rain but. And you level of humidity increase is very welcome where they getting a lot of rain is in Tampa Boyd they've gotten ten inches in just the last six days. In the future Ritter showing more activity as we go through tomorrow also flood watches remain off. We've got severe thunderstorm watches are posted from southwest Ohio all the way to northern new England and that's where the thunderstorms on the most active tonight. Roll the up future castor tomorrow morning and we'll see some thunderstorms potentially between Boston and Philadelphia but nothing like Tampa first three days of August the forty seat what they typically get. The entire month something today rob thank you.

This transcript has been automatically generated and may not be 100% accurate.

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