Forecast: A last hurrah for heat | You know it’s summer in D.C. when... | Photos: D.C. sweats out heatwave | Poll: Sultry heat or frigid cold?

Updated, Thursday, 7:27 a.m.

Outages have continued into this morning for residents, government agencies and a school. See this story for a full rundown.

Updated, 11:39 a.m.

Amid a nasty heatwave, thousands of area residents, a D.C. school and a number of D.C. government agencies are without power Wednesday morning. Prince George’s County has also opened cooling centers.

Pepco is reporting about 2,000 outages with the bulk occurring in D.C., according to a utility outage map. Dominion Power reports about 400 outages in Northern Virginia.

Pepco officials said about 1,500 D.C. residents who live north of Union Station are still in the dark after several underground cables that provide power in the area were damaged Tuesday afternoon. Power will likely remain out until this evening, according to officials.

About 4,500 residents in the area around North Capitol and in Northeast were without power overnight, and 26 people spent the night at Walker Jones Education Center, which the District government opened as an emergency cooling center, according to Millicent West, director of the Homeland Security and Emergency Management Agency.

Concerned about elderly residents at Sibley Towers, Golden Rule and Tyler House, staff from several city agencies went door-to-door to check on residents.

Four Metro buses were also used as cooling centers. Residents in the area were given food, snacks, water overnight and breakfast Wednesday morning.

Five city government buildings in the area are also without power. The Gray administration did not have an immediate number of employees affected, but did provide a list of government buildings affected (see the list below). The power outage has also forced the closure of J.O. Wilson Elementary School in Northeast D.C., according to the D.C. school system.

The Federal Energy Regulatory Commission also canceled work today for all employees, except emergency personnel, following an outage there.

Prince George’s County opened six cooling centers for seniors and the general population at 10 a.m. this morning. (See locations below).

D.C. offices affected by power outages:

•899 North Capitol St. NE: Office of the State Superintendent of Education, Department of Health Care Finance, Department of Health

•810 First St. NE: Department of Insurance, Securities and Banking

•801 North Capitol St. NE: Community College of the District of Columbia

•1133 North Capitol St. NE: D.C. Housing Authority

•1200 & 1300 First St. NE: District Department of the Environment, D.C. Public Schools (DCPS central-office functions have been moved to remote locations, including Eastern High School and employees’ homes)

•33 N St. NE: Department of Human Services

•35 K St. NE:  Mental Health Clinic

Prince George’s County cooling centers

For seniors :
•New Carrolton Municipal Center, 6016 Princess Garden Pkwy., New Carrolton (10 a.m. – 3 p.m.)  
•Camp Springs Senior Center, 6420 Allentown Rd., Camp Springs (9 a.m. – 5 p.m.)
 
For general public from 10 a.m. to 9 p.m.:

•Fairland Regional Park, 14110 Old Gunpowder Rd., Laurel
•Rollingcrest Community Center, 6120 Sargent Rd., Chillum
•Palmer Park Community Center, 7720 Barlowe Rd., Landover
•Hillcrest Heights Community Center, 2300 Oxon Run Dr., Hillcrest Heights

Updated, 6:53 a.m.

The power outage has also forced the closure of J.O. Wilson Elementary School in Northeast D.C., according to the school system.

Original post:

A federal agency that regulates electricity will be closed Wednesday because electricity has been cut off to its headquarters building, the agency announced.

The Federal Energy Regulatory Commission said only emergency personnel are to report Wednesday at the commission’s headquarters on First Street NE. FERC has jurisdiction over interstate electricity sales and wholesale electric rates.

FERC said all of its systems were down late Tuesday due to a power outage in the neighborhood of the headquarters.

Pepco said late Monday that it was working to determine the source of the problem, which affected about 1,500 homes and businesses. A spokesman said the root cause of the problem had not been found.