BUFFALO, N.Y. — A snowfall that brought huge drifts and closed roads in the Buffalo area finally ended Friday, yet residents still couldn’t breathe easy, as the looming threat of rain and higher temperatures through the weekend and beyond raised the possibility of floods and more roofs collapsing under the heavy loads.

More than 30 major roof collapses, most involving farm and flat-roof buildings, were reported overnight, officials said Friday, after snow Thursday brought the Buffalo area’s three-day total to an epic 7 feet or more. Little or no snow was expected on Friday, and the forecast called for a chance of rain on Saturday and more through Monday, along with temperatures of about 60 degrees.

As towns and villages began preparing for potential flooding, homeowners and store employees around the region climbed onto roofs to shovel off the snow and reduce the danger of collapse.

“Five hours yesterday and that’s just the beginning,” John Normile said Friday of the effort to clear snow from the roof of his Lake View ranch-style home. He, along with his daughter and her boyfriend, had knocked about 6 feet off the back of the house and planned to be back at it for a second day.

“We’re getting really concerned about the weight of it,” Normile said. “We’ve got to do it before the rain comes.”

The storms were blamed for at least 12 deaths in western New York, mostly from heart attacks and exposure. The most recent victims were two elderly residents of a nursing home that was evacuated amid concerns of a roof collapse, Deputy Erie County Executive Richard Tobe said Friday.

“We know that relocating people from nursing homes is a very tough thing to do,” Tobe said.

More than 50 people were evacuated from several mobile home parks in suburban Cheektowaga and West Seneca on Thursday because roofs were buckling. Tobe said at least 90 small roof collapses involving carports and other structures had been reported by Friday morning, in addition to damage to a pharmacy and a metal warehouse operated by a Christmas decorations company, where damage was estimated in the millions.