Heavy rains have been wreaking havoc in the Mid-Atlantic region, flooding streets, stalling cars, delaying rail and air travel and canceling outdoor events.

Flash flood warnings were in effect Friday evening was Washington and much of Maryland. Firefighters in Washington rescued at least two people from vehicles stalled in water in Southeast.

ABC7News reported delays of at least an hour at the area's three airports. CSX and Norfolk Southern trains were ordered to reduce speeds.

In Frederick, sections of several streets were closed because of flooding.

In Maryland and Washington, utilities, already slammed by power outages caused by late Thursday's storms, worked to restore power as Friday's weather battered the area.