Three separate fires in the District on Friday night and Saturday damaged an ambulance, displaced families in Southeast and sent smoke billowing above Columbia Heights.

The Columbia Heights fire, in the 2900 block of 13th Street NW, was at the top of a four-
story row house that neighbors said was being renovated. The smoke, pouring from the roof about 6 p.m. Saturday, “looked bad,” one neighbor said.

However, he said, firefighters extinguished the fire quickly. No injuries were reported.

Earlier Saturday, fire leapt from corner windows of a second-floor apartment in a three-story red brick building in the 3200 block of 23rd Street SE.

American Red Cross volunteers aided 13 displaced adults and 14 children with lodging, meals and clothing, said Red Cross official Paul Carden. Mayor Vincent C. Gray (D) went to the site, near Suitland Parkway.

Perhaps the fire in the least expected location was the one reported Friday night in a fire department ambulance.

The fire was spotted after Ambulance 27 arrived at MedStar Washington Hospital Center on a “routine EMS transport,” according to the Web site.

It appeared small, and according to the firefighters’ union, was quickly extinguished.

In a Twitter posting, the union said the ambulance had recently returned to service after electrical repairs.