Authorities reported high standing water and flooding throughout the D.C. region, and some MARC service was suspended as heavy rainfall sweeps through the area Friday morning.

U.S. Park Police closed part of Rock Creek Parkway in both directions between Calvert Street and Waterside Drive NW for several hours. Beach Drive at the Maryland/D.C. line was also closed because of the heavy rains hitting the region. Drivers on twitter described tough conditions on Beach Drive just before authorities closed the roadway.

MARC train service on the Brunswick and Martinsburg lines is suspended because of a fallen tree on the track. On VRE, flash flood restrictions were in place on both its Fredericksburg and Manassas lines. Trains could only go up to 40 mph.

On the roads, there were closings throughout the region. In the District, high water in some areas was also causing road closures. Downed trees also blocked roads. Fire and rescue officials in Montgomery County said they were involved in several water rescues, including one in the 8500 block of Scott Drive near Wootton Parkway in Rockville and another in Clarksburg at New Cut Road near Frederick Road.

In Fairfax, eastbound Interstate 66 at Route 123 has reports of high standing water. Other roadways in the Fairfax area were closed, according to officials. In Loudoun County, there were reports of high water and parts of Route 15 being closed. There were roughly 20 high-standing-water warnings on washed-out roads in Prince William County, according to officials there. There was also high water reported and a rescue of a driver in Vienna on Hunter Mill Road.

Officials warned drivers not to cross roads that appear to have high standing water and to slow down, as the heavy rain was expected to last throughout the morning commute. There were few major accidents in the region. One occurred on the Baltimore-Washington Parkway, blocking northbound lanes near NASA in Greenbelt, authorities said.

In Glen Burnie, at Route 50 west and Route 424, there was a report of a serious accident, and some lanes of Route 50 were blocked. Investigators arrived on the scene, and there were reportedly wires down.

Wind restrictions were put in place for the Bay Bridge.

Throughout the region, there were reports — and pictures on Twitter — of high water on roadways.



For more transportation-related news, click here. Lori Aratani, Lynh Bui, Arelis R. Hernandez  and Rachel Weiner contributed to this report.