- Associated Press - Thursday, August 11, 2016

BISMARCK, N.D. (AP) - Strong thunderstorms this week have caused damage throughout the Dakotas.

In North Dakota, storms Tuesday and Wednesday caused flash flooding in several counties, including the flooding of state Highway 11 in the Ellendale area. That prompted a warning to motorists from the state Transportation Department.

Winds gusting more than 70 mph damaged buildings in Strasburg including a school addition under construction, and knocked out power in Linton.

Strong winds also hit South Dakota, causing widespread tree damage and scattered power outages. A convenience store in Ipswich lost part of a roof, and numerous power poles in the Rapid City area were knocked down.

The National Weather Service says Rapid City experienced a rare phenomenon known as a heat burst, which is strong winds that occur when a thunderstorm rapidly decays.

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