What to Know Periods of heavy rain are likely to continue throughout the day and into Thursday night, with an additional 2 to 3 inches of rain possible.

Flooding is a major concern with these bands of heavy rain. Roads may become impassible very quickly.

One woman had to be rescued Thursday morning after high water trapped her inside her vehicle at Arlington Memorial Circle along GW Parkway.

The heavy rain may be over, but the D.C. area should expect showers to continue through Saturday, Storm Team4 says.

Meteorologist Amelia Draper said scattered showers could slow down the Friday morning commute, however, the rain will not be as heavy as previous days.

Streets in Alexandria, Virginia's Old Town flooded Thursday evening.

SAFETY: Old Town is flooding w/ 2 hrs remaining until high tide. Use caution in the area. Do not drive or walk thru standing water. pic.twitter.com/oV6aSFfZ7t — Alexandria Police (@AlexandriaVAPD) September 29, 2016

D.C. is under a coastal flood warning through midnight Friday. A flash flood watch has been cancelled for most of the D.C. area.

On this Weather Alert Day, see the Weather Alert page for the full list of watches and warnings.

There is mud and debris scattered across several roads in Stafford County, Virginia, after the streets were flooded. Northern Virginia Bureau Reporter David Culver explains what drivers can expect for their upcoming commute.

Rain is expected during the Thursday evening commute, with high water possible in low-lying locations. Flooding is a major concern with these bands of heavy rain. Roads may become impassible quickly. Remember to NEVER drive through standing water.

Several car crashes occurred during the rainy morning commute, and many homes were without power.

One woman had to be rescued Thursday morning after high water trapped her inside her vehicle at Arlington Memorial Circle along George Washington Parkway.

Heavy rain early Thursday affected rail commuters. VRE said riders could expect delays of at least 20 minutes on all Fredericksburg Line trains due to flash flood speed restrictions.

Stafford County Public Schools are closed Thursday because of flooding on some roads.

Although wet weather will likely continue through Sunday, the heaviest rain should begin to subside Thursday night.

The weather alert from the National Weather Service said there is a potential for flash flooding of small streams, creeks and urban areas.

Flood warnings in bright green, including DC Metro through midday, and flash flood watch for all until tomorrow AM. Stay wx ready! pic.twitter.com/LiPgH2jYrb — Amelia Draper (@amelia_draper) September 29, 2016

Even before the most powerful weather arrived, two houses in Montgomery County were struck by lightning Wednesday afternoon, a Montgomery County Fire & Rescue spokesman said.

The two houses struck by lightning were in the 8600 block of Augusta Farm Lane and the 11300 block of Neelsville Church Road. The house on Augusta Farm Lane sustained some damage to its roof, said Montgomery County Fire & Rescue spokesman Pete Piringer. The single occupant of the house was not hurt, he said. There was no information immediately available on the other house that was struck.

Piringer advised residents and drivers to be mindful of street flooding "target hazards."

MoCo Residents & Motorists - Take a look @ Street Flooding 'target hazards' https://t.co/PFFuF6FP8c Be Aware, Be Informed, Be Prepared pic.twitter.com/NynzzMz1yA — Pete Piringer (@mcfrsPIO) September 28, 2016

Fire and rescue crews across our area prepared for possible flash flooding overnight Wednesday. News4’s Shomari Stone reports from Bethesda where water rescue teams are ready to go if needed.