Updated at 10:24 a.m.

By mid-morning Wednesday, some roadways in the area had reopened, and power in some places had been restored, as crews worked to clear debris and downed trees, and fix downed poles and wires from the overnight storm.

Dominion Virginia Power said on its Web site that about 3,700 customers in the Northern Virginia area were still without power as of 10:30 a.m. Wednesday. That was down from nearly 8,000 earlier in the day. Pepco had about 900 without power in the region.

In Fairfax County, crews were still working to clear downed trees and other debris along Route 123. Part of the roadway was shut down in the morning rush hour, and police warned that drivers should expect delays in the evening rush hour as well along Route 123 from Popes Head to Braddock roads.

Original post at 5:30 a.m.

Several roads in the area are closed due to downed trees and power lines, and more than 7,000 customers are without power Wednesday morning after severe thunderstorms swept through the area Tuesday night. In addition, one man is dead in Montgomery County after the pickup truck he was driving hit a downed tree in the roadway.

In Prince George’s County, one lane was blocked early Wednesday morning on the southbound side of the Baltimore-Washington Parkway near Route 198 in Laurel because of a downed tree, authorities said. An apartment fire in Greenbelt on Tuesday night that caused 22 units to be displaced was likely caused by a lightning strike, they said. No one was injured.

On Wednesday morning, Metro buses in some areas of Prince George’s County were experiencing delays because of downed trees, according to a Twitter message from the transit agency.

In Fairfax County, part of Braddock Road near Route 123 was closed in part because of downed wires in that area. Virginia’s transportation department put out a list of dozens of roadways it oversees that have downed trees or poles and are closed in full, or in part. Police in Fairfax warned drivers to use caution in the area of Route 123 that is closed because of storm damage.

Dominion Virginia Power said about 7,800 of its customers in Northern Virginia — mostly in the Fairfax area — had no power. According to Pepco’s web site, about 700 customers — mostly in the District and Prince George’s County — were without power.

Crews for both companies said they were working to restore the power. It varied on the estimated times that power would be back in place. Customers are advised to check with their respective utility company.