ALEXANDRIA, Va. - Forecasters are warning about the possibility of flooding across for much of Maryland, DC and Northern Virginia.
The National Weather Service says they are expecting heavy rainfall totals over the next 24 hours for Montgomery County and the National Capital Region.
The Baltimore/Washington office of the National Weather Service says moderate to heavy rainfall associated with the remnants of Tropical Storm Gordon will persist through late Sunday night.
In combination with rainfall In the past several days, Flood Watches and Warnings have been issued across the area. Creeks and the Potomac River water levels rising, low lying areas already impacted.
In Old Town Alexandria, six to eight inches of water rose through the streets as high tide came in on Sunday evening.
Investigators conducted swift water rescues in the area to get people out of flooded buildings. Several roads in lower parts of Old Town.
In DC on Sunday, a drive slid down a 50-foot fold in Northeast, smashing into glass windows of a Youth Detention Center on Mount Olivet Road.
A flood warning is in effect for DC, as well as much of Maryland including Baltimore city and county, part of Anne Arundel County, Frederick County and Harford County.
In Virginia, Arlington, Culpeper, Loudoun, Fairfax, Fauquier, Orange, Page, and Prince William Counties are under the flood watch as well.
Officials at Sandy Point State Park in Maryland say that the park is experiencing tidal flooding and rough water conditions due to high winds. They say visitors should avoid areas of ponding and standing water. Swimming and other water activities are strongly discouraged due to the rough conditions.
The National Weather Service says NOAA Hurricane Hunters discovered Florence strengthening and could become a major Hurricane on Monday.
The center says it's still too early to predict the hurricane's exact path.
The Associated Press contributed to this report.