00:49 Ellicott City, Maryland Flooding 911 Call Dramatic 911 call for the flash flooding that devastated parts of Ellicott City, MD., and open sewage sewage problems that are following the disaster.

At a Glance A broken sewer line has sent an estimated 5 million gallons of sewage per day into the Patapsco River since Saturday.

Two buildings on Main Street damaged by Saturday's flood are at risk of imminent collapse. After devastating floods ravaged Ellicott City, Maryland, over the weekend, authorities are attempting to repair a broken sewer line that sent millions of gallons of sewage into the Patapsco River.

The Baltimore Sun reports that the National Guard airlifted equipment into the city on Wednesday to make the necessary repairs to the line and put a stop to the estimated 5 million gallons that have flowed into the Sucker Branch tributary of the Patapsco River.

Jay Apperson, a spokesman for the Maryland Department of the Environment, told the Sun the break is one of several reported in the Baltimore area after heavy downpours led to flash flooding.

Another 50,000 gallons of sewage were dumped in Patapsco tributaries from four other sewer overflows in Baltimore County.

Apperson said repair work on the broken line, which was not discovered until Tuesday, is being hindered by a washed-out road.

Crews hoped to stop the overflow by Wednesday night.

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Anne Arundel County issued a warning against coming into direct contact with water from the Patapsco from Howard County to Baltimore and recommends that anyone who comes in contact with the water wash immediately, including your clothes, with soap and water.

Testing on the river water for bacteria will not be conducted for a couple of weeks, Alice Volpitta, a water-quality manager for Blue Water Baltimore, told the Sun.

Meanwhile, two buildings on Ellicott City's Main Street damaged by the flood could collapse at any moment and engineers are trying to figure out how to stabilize them, ABC7 reports.

Residents who had been told they could return to downtown to clean up were once again told they needed to stay away because of the danger.

MORE ON WEATHER.COM: Ellicott City Flooding July 30, 2016