Downed power lines on North Glebe Road in Arlington, Va. (J. Lawler Duggan/For The Washington Post)

A line of severe storms left more than 120,000 electricity customers without power Thursday in the Washington region, knocking down trees and utility poles while briefly triggering a tornado warning for the District.

The bulk of the power outages occurred in Northern Virginia, where Dominion Energy reported them scattered across the region. More than 115,000 Dominion customers lost power, with the problems centered on Fairfax and Arlington counties.

About 4,000 customers lost power in the District, while Montgomery and Prince George’s counties had more than 20,000 outages, according to Pepco.

The intense storms triggered a tornado warning for the District ahead of the evening rush. The National Weather Service said radar indicated a tornado was possible in an area of rotation near the Capitol and Nationals Park. The warning eventually was canceled minutes before it was set to expire.

Storms produced gusty winds as they moved through Arlington and Alexandria, clocking in 68 mph at Reagan National Airport. The airport recorded three gusts of at least 67 mph in a span of seven minutes, according to The Washington Post’s Capital Weather Gang.

D.C. fire officials said a tree fell on two houses in the 1400 block of 18th Place in Southeast. One resident and two construction workers were evacuated and no injuries were reported.

In Fairfax County, police said they received two calls of trees falling on houses and one report of a tree falling on a car. Several trees were down in Bethesda, including one that fell on a house after being struck by lightning, said Montgomery County Fire and Rescue spokesman Pete Piringer. No one was injured.

Piringer said downed wires prompted the closure of several roads, especially in northern parts of the county. Old Hundred Road was closed between Barnesville Road and Comus Road, while some lanes of Rockville Pike were blocked after a vehicle was stranded in high water. Georgia Avenue was closed in both directions in Brookville.

In Virginia, road closures included parts of Glebe Road in Arlington -- which was expected to be closed up to 12 hours -- and the Fairfax County Parkway. Several schools and libraries lost power, prompting early closures.

Peter Hermann contributed to this report.