UPDATE 4:28 p.m.: The second round rain heading toward the Washington region is not as impressive as first thought, according to ABC 7 Meteorologist Chris Naille.

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The storm is weakening as it crosses the mountains, meaning "we're not going to have a repeat, at least at this point, of what we had this morning," Naille said.

There will, however, still be areas of rain over the next several hours and into the overnight. But even a little bit of rain can be a problem in the hardest-hit areas.

Naille warns that some areas have already seen between two and four inches of rain today, and it only requires a few tenths of an inch to cause more flooding.

TBD is covering the impact of today's storms. Find more information on power outages and contribute your morning commute photos here.ng the evening commute.

UPDATE 1:25 p.m.: With water receding across the region, ABC 7 meteorologists are again keeping an eye on the sky as another massive dose of rain closes in.

The second round is expected to hit about 4 p.m. and last until 8 p.m. While the rain is not expected to be as heavy, it will likely cause more problems during the evening rush hours.

While Reagan National Airport had recorded just shy of a half-inch of rain as of 1 p.m., some localized areas have seen between 2 and 4 inches, according to ABC 7 Meteorologist Chris Naille. That has left the ground saturated, making it more likely any evening precipitation will cause a second round of flooding.

UPDATE 12:25 p.m.: Flood warnings are no longer in effect and water levels are receding in many areas that flooded this morning.

UPDATE 10:13 a.m.: More incidents of flood damage:

Flooded street at Rte. 28 SB at Baur in Montgomery Co. 

Tree Down at Park St. & Beach Dr. NW

Water main break at 16th & Franklin St., NE

Tree toppled onto car at 1600 Hobart St, NW

Traffic signals out at Veirs Mill Rd & Newport Mill Rd. Pepco on the scene.

Bike trail and parking lot at Sligo Creek are under water.  

UPDATE 9:01 a.m.: The DC Department of Public Works will bee providing sandbags to D.C. residents today at its New Jersey Avenue and K Street, SE site (entrance on New Jersey at I Street, SE).

UPDATE 8:18 a.m.: Metro Red Line Alert: there's a disruption at Union Station in both directions. Trains sharing tracks btwn Judiciary Sq. & Rhode Island Avenue due to a report of smoke at Union Station. Delays in both directions.

UPDATE 8:15 a.m.: Several motorists are being evaluated after water rescues on Canal Road and on Broad Branch Road in Northwest.

UPDATE 8:14 a.m.: Power Outages

PEPCO 
District of Columbia 150
Montgomery 5121
Prince George's 1672 

DOMINION
Northern Virginia 788

BGE
Anne Arundel 107
Calvert 0
Montgomery 0
Prince George's 64

UPDATE 7:58 a.m.: The National Weather Service has now issued a flood warning for urban areas and small streams in Fauquier, Loudoun, Clarke and Warren counties until 11:45 a.m.

UPDATE 7:54 a.m.: WTOP reports deep water has closed Rock Creek Park and Beach Drive.

UPDATE 7:50 a.m.: The National Weather Service has issued a flood warning for urban areas and small streams in Anne Arundel and Prince George's counties lasting until 11:30 a.m.

UPDATE 7:36 a.m.: We're hearing reports that there may be two vehicles trapped in rising water in Northwest, with multiple people inside.

UPDATE 7:10 a.m.: D.C. Fire and EMS reports a water rescue is in progress in the 4400 block of Broad Branch Road in Northwest. Officials say at least one person is inside of a car stuck in rising water.

UPDATE 6:37 a.m.: We're hearing reports of out traffic signals and high water in Montgomery County. There's also reports of flooding in the Tyson's Corner area.

UPDATE 6:21 a.m.: ABC 7 News reports Route 1 is closed in both directions due to standing water along Sunnyside Ave. in Beltsville.

UPDATE 6:05 a.m.: Metro Traffic's Lisa Baden reports down wires along Sunnyside Avenue between Edmonston Road and the train tracks in Beltsville, Md.

UPDATE 5 a.m.: Power Outages

PEPCO
District of Columbia 151
Montgomery 1423
Prince George's 1

DOMINION
Northern Virginia Area 5,439

BGE
Anne Arundel 23
Calvert 0
Montgomery 0
Prince George's 0

UPDATE 4:58 a.m.: There's a report of high water on southbound U.S. 1 between Powder Mill Road and Muirkirk Road. This may cause some hazardous driving conditions. Be careful.