Hundreds of thousands are without power 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)

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

Just over 873,000 households nationwide were without power as of 9:45 a.m. ET on Friday. The vast majority of those outages — more than 772,000 — 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.