Continued from page 1

According to the National Weather Service, the area could see some scattered precipitation in the coming days, with a 40 percent chance of rain on Saturday being the most likely in the seven-day forecast. Mr. Roozen said employees had filled spare koi ponds with water and that he’d taken some water to his own house a few blocks down the street.

The WSSC disruption is reminiscent of last summer’s derecho, which knocked out power to hundreds of thousands of D.C.-area residents, some for more than a week, during a heat wave. This time, residents will have electricity, though officials said some businesses and homes that use water to cool air conditioning units will have to find another way to keep their systems running.

Two county pools also will be out of service, Parks and Recreation spokeswoman Anita Pesses said. The county health department requires that public pools have incoming water to keep filters running and chemicals balanced. The North Barnaby pool in Oxon Hill and Allentown pool in Fort Washington will be closed.

Ronald Gill, the county’s director of emergency management, said county officials were informed of the failing pipe at about 3 p.m. Monday. By Tuesday afternoon, the construction site for the pipeline was buzzing with trucks kicking up dust and gravel and workers in neon work vests studying the land before the repair.

County officials said no hospitals are in the affected area, and Fire Chief Marc S. Bashoor said his department had filled its tanker trucks, which can carry up to 500 gallons of water, and were prepared for any chance of fire.

⦁ Celina Durgin contributed to this report.