Rain runoff from powerful storms that moved across Iowa has forced closure of Iowa Highway 92 in Mahaska County.

The Iowa Transportation Department says traffic is closed in both directions between County Road T-25 and Iowa Highway 163. The department says the closure could last into Wednesday.

A flash flood warning remained posted for Mahaska and northeastern Marion counties, southeast of Des Moines. The NationalWeather Service says up to 5 inches of rain fell in some areas.

Thunderstorms were blamed for power outages in the Des Moines area on Monday, and strong winds knocked the roof off a building at Kalona in rural Johnson County.

Earlier Monday, the storms caused minor street flooding in Carroll and Manning.