Drivers should use caution Friday as some roads are blocked by downed trees after days of heavy rain in the area.

On Friday, officials said a fallen tree has closed all lanes of River Road near Falls Road in Montgomery County. Drivers should expect significant delays. It was not clear when the road would reopen.

In Poolsville, White’s Ferry Road near Partnership Road is closed because of a downed tree as well.

In the District, part of Southern Avenue in Southeast is closed because of a downed tree.

Another tree is down in the 2800 block of Chesterfield Place NW, police said, and part of the road is closed.

There are also reports of high water in parts of the District.

Earlier in the morning, there was a downed tree along Old Dominion Driver near Towlston Road in McLean, Va., that had blocked the roadway.