AUSTIN, Texas (AP) — A huge swath of the U.S. braced Tuesday for a major winter storm that was expected to dump heavy snow in the Rockies, ice highways, disrupt travel across the Midwest and plunge temperatures below freezing in Texas.

The blast of winter weather comes nearly a year after a catastrophic freeze that devastated Texas’ power grid and knocked power out for days, causing hundreds of deaths in one of the worst blackouts in U.S. history. The forecast this week, however, does not call for the same prolonged and frigid temperatures like the February 2021 storm.

“No one can guarantee that there won’t be any” outages caused by demand on the grid, Texas Gov. Greg Abbott said during a briefing in Austin, where state officials defended their readiness for the days ahead. “But what we will work to achieve, and what we’re prepared to achieve is that power is going to stay on across the entire state.”

In November, Abbott told Austin television station KTBC ahead of winter that “I can guarantee the lights will stay on.”

Winter storm watches and warnings covered a wide swath of the country from El Paso, Texas, through the Midwest and parts of the Northeast to Burlington, Vermont. The storm follows a vicious nor’easter that brought blizzard conditions to many parts of the East Coast.

During the multiday storm this week, some areas may see a mix of rain and freezing rain before it changes to snow.

“It will be a very messy system and will make travel very difficult,” said Marty Rausch, a meteorologist with the National Weather Service in College Park, Maryland.

The National Weather Service said 6 to 12 inches of snow was expected by Thursday morning in parts of the Rockies and Midwest, while heavy ice is likely from Texas through the Ohio Valley.

On Wednesday and Thursday, the weather service said 8 to 14 inches of snow was possible in parts of Michigan, including Detroit. From Wednesday through Friday morning, 9 to 14 inches of snow was forecast in northwestern Ohio.

In Tulsa, Oklahoma, where up to 7 inches of snow and sleet are forecast but little ice, emergency management director Joe Kralicek said the event is not expected to cause large-scale power outages based on an ice index used by the National Weather Service.

“We could see some power outages, however, it’s also suggesting that they be limited in scope and nature and very short term in duration,” Kralicek said.

Becky Gligo, director of the nonprofit Housing Solutions in Tulsa said teams are working to move homeless people into shelters ahead of overnight lows that are expected to drop into single digits by Friday night.

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Associated Press journalists Julie Walker in New York, Jill Bleed in Little Rock, Arkansas, and Ken Miller in Oklahoma City contributed to this report.