First snow, now floods. Upstate New York is bracing for the possibility of floods and roof collapses, as their record snowfall begins to melt under a forecast of rain and warmer temperatures. The area received more than a typical year’s worth of snow accumulation in the last week’s storm.

The epic snowstorm near Buffalo, which dumped more than 7 feet of snow over a period of 3 days, resulted in a death toll so far of 13, including two elderly nursing home residents who died Thursday during their evacuation when the roof began to buckle. There have already been at least 30 building collapses, and more are expected as the snow begins to melt and gets even heavier.

Warm weather and rain is expected the next few days, with temperatures near 60 by Monday, bringing concern about rapidly melting snow leading to threats of flooding. New York Governor Andrew Cuomo says they are preparing for more flooding than the region has seen in a long time. Never has there been this much snow and this much accelerated melting. Snow melt may overwhelm drains, particularly those blocked by fallen leaves.

Residents are clearing valuables out of basements and attempting to clear drains of snow and debris. The state is sending dump trucks, snow blowers and additional pumps, and is closely monitoring flooding in 13 local waste water treatment plants.

Jon Hitchcock, Weather Service meteorologist, said the biggest flood threat will be Monday, when temperatures are the highest. He said general urban flooding is possible. The snow pack contains the equivalent of 6 inches of rain, which is expected to be released over two days. Erie County Executive Mark Poloncarz said that some areas should expect 5 to 6 feet of water.