A million households have lost power so far as major winter storm blasts the U.S.

A woman is lit by sunlight Wednesday while sitting inside a coffee shop in San Francisco. A brutal winter storm knocked out power in California, closed interstate highways from Arizona to Wyoming and prompted more than 1,200 flight cancellations Wednesday — and the worst won’t be over for several days.

Godofredo A. Vásquez/AP

Godofredo A. Vásquez/AP

A major, prolonged winter storm continues to bring heavy snow, blizzard conditions and significant ice from California to the Northeast this week.

About a million households nationwide were without power as of 1 p.m. ET on Thursday. The vast majority of those outages — more than 750,000 — are in Michigan, where residents have been hit with freezing rain and ice. That’s according to PowerOutage.us, which tracks outages state-by-state.

“Power outages and areas of tree damage will be possible across these areas [from the Great Lakes into the Northeast], and especially for the locations seeing a combination of stronger winds and accumulating ice,” the National Weather Service predicted.

Snow is falling at heavy rates of 1-2 inches per hour near the Great Lakes, and combining with 40-50 mph winds. That will drive significant impacts that will include major disruptions to travel, infrastructure, livestock and recreation,” the NWS wrote.

Parts of the Midwest and the Northeast could still see 6 to 12 more inches of snow, with some areas receiving as many as 18 inches, the NWS predicted.

Airports across the Midwest, including in Minneapolis, Chicago, Milwaukee and Detroit have faced a plethora of cancellations. On Wednesday, more than 1,600 flights were canceled and an additional 5,200 were delayed. Thursday brought more of the same — more than 1,700 flights were canceled and almost 10,000 delayed as of Thursday morning, according to FlightAware.

People make their way through a snow-covered street in the Grand Park neighborhood of Portland, Ore., on Thursday. The city experienced its second snowiest day on record.

Drew Callister/AP

Drew Callister/AP

In the West, Portland received 10 inches of snow in the second-snowiest day ever recorded, Oregon Public Broadcasting reported.

The storm also has brought heavy snow to parts of California that rarely see it. Mount Baldy — which sits east of Los Angeles, at just above 4,000 feet — could get a whopping 4.5 feet of snow by Saturday.

In addition to snow in the mountains, the NWS predicted heavy rainfall in Southern California and warned of “a heightened risk of flash flooding” beginning on Friday morning and into Saturday.

Simultaneously, parts of the Southeast, Mid-Atlantic and Ohio Valley are seeing record-setting warmth: The NWS says temperatures on Thursday are forecasted to be as much as 40 degrees above normal.

Atlanta was 81 degrees on Wednesday, an all-time record in February. Washington, D.C., reached 79 degrees, New Orleans reached 83 degrees and Nashville, Tenn., was 80 degrees on Wednesday.