More than 4 million people across five states were under winter storm alerts on Sunday as heavy lake-effect snow continued to bury the Great Lakes region, prompting emergency declarations and the deployment of National Guard troops to rescue stranded motorists.

Highmark Stadium, situated in Orchard Park, is under a Lake-Effect Snow Warning for Sunday night’s San Francisco 49ers vs. Buffalo Bills game. Lake-effect snow bands could produce multiple feet of

In late fall and winter, lake-effect snow is a common occurrence in the Great Lakes region. "Lake-effect snow occurs when cold air, often originating from Canada, moves across the open waters of the Great Lakes.