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.

Forecasters warned that some areas would be “paralyzed” by the storm. Nearly three feet of snow had already accumulated in Perrysburg, N.Y., about 30 miles south of Buffalo.

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 Erie County, Ohio, a lake-effect snow warning is in place until 7 p.m. on Tuesday. Between 10 and 20 inches of heavy snow accumulations are expected in the north of the county, while between 12 and 24 inches are expected in the south.

Lake-effect snow blanketed swaths of the U.S. as Thanksgiving travelers journeyed home this holiday weekend, with more snow expected to fall over the Great Lakes region through the week. While the weather event dumped dozens of inches of snow in upstate New York,

Cities near the Great Lakes have seen up to three feet of lake effect snow over the weekend. See how long it will stay in the forecast.

Northern states have woken up from the holidays to a blanket of snow that has been as deep as 6 feet in some areas.

Post-Thanksgiving travel will be treacherous in parts of the Great Lakes region on Sunday due to heavy lake-effect snow, while biting cold temperatures sweep across a large swath of the United States.