OMAHA, Neb. (AP) — Heavy rainfall has caused flooding and power outages in Omaha, with the storms bringing down tree limbs and high waters stranding some motorists.

Omaha firefighters say a woman and three children had to be rescued from a minivan, which was trapped under a bridge. In some places, manhole covers popped off because the runoff overwhelmed storm sewers. More than 1,300 residents were without electricity Tuesday night.

For about half an hour, the Douglas County 911 system also wasn’t working properly. Mark Conrey, director of the 911 call center, says he’ll be working to find out what happened.

The rains also led to the cancellation of Wednesday events at a Grand Island farm show. A Nebraska trooper says muddy conditions have made parking near the Husker Harvest Days inaccessible.