More than 230 million people are under winter storm threats as officials brace for power outages and travel difficulties.

A massive winter storm canceled over thousands of flights and caused 140,000 power outages across the nation this weekend.

The electric grid in many parts of the U.S. is already under strain due to rising demand from data centers and the slow construction of new power generation.

CLEVELAND, Ohio - Winter Storm Fern is on track to hit northern Ohio late Saturday through Monday morning, with widespread snow accumulations expected to create hazardous travel conditions. The National Weather Service has issued a Winter Storm Warning for the Cleveland area from 7 p.

Experts tell TIME there's a thin line between being prepared and panic buying, and other people have a lot to do with it

A winter storm warning was released by the National Weather Service on Sunday at 5:01 a.m. in effect until Monday at 1 p.m. for Northern Clinton, Northern Centre, Southern Centre, Northern Lycoming, Southern Clinton and Southern Lycoming as well as Warren,

"Winds will pick up in the afternoon and evening, especially near the coast and could create near white-out conditions/near blizzard conditions with winds gusting 30 to 40 mph at times."

An extreme winter storm is underway impacting two-thirds of the U.S. Starting Friday and expected to last through Monday, freezing rain, ice, and dangerously low temperatures will stretch from New Mexico to the Northeast. Thousands of flights have been cancelled and power outages are of catastrophic concern especially for the southern states.