Weather system triggered landslides, closed roads and damaged property across the Pacific North West.
Heavy rainfall and strong winds caused power outages across in some states as Winter Storm Harold made its way across the East Coast.
More than 2,600 customers in Virginia are without power on Christmas Day after a tornado hit Suffolk late Thursday night.
Nearly half a million energy customers are without power following the severe weather on Sunday night.
There are more than 2.2 million power outages reported across Georgia, Louisiana, Oklahoma, Alabama and Mississippi, as of Thursday.
Pacific Gas & Electric has begun to restore power to homes after it blacked out an estimated one million people in northern California as windstorm sparks wildfire warnings.
At one point, more than half a million residents of the East Coast states were without power.
Baldwin County and Mobile County are the worst-affected in Alabama, with more than a combined 260,000 without power.
With more than 650 power outages across Utah, residents have been encouraged stay indoors and off the roads as an arctic storm system hits the state with powerful winds and a cold front.
On Sunday, Portland General Electric warned some 5,000 customers living near Mount Hood that they may temporarily lose their power.
Power outages could continue a few more weeks for residents of the state's hardest hit area, and so many people either have no water access or boil water notices. Chlorine in natural waterways also poses a health risk to both humans and wildlife.
Three people in Texas and a family of five in Louisiana were reported dead Friday from carbon monoxide poisoning. In both instances, the people used portable generators to provide them electricity during power outages caused by the hurricane.
Entergy has warned that the hardest-hit areas may be without power for weeks, as "restoration may be hampered by flooding, blocked access, or other obstacles."
The National Weather Service is warning of "dangerously hot conditions" in many areas of the western United States over the next few days.
Residents of the Upper West Side, Upper East Side, and Harlem woke up to darkness this morning, as a power outage affected the Upper Manhattan neighborhoods.
More than a million people across New York and New Jersey are without power, with energy companies warning that restorations could take days.
The energy company says restoration work in the hardest-hit areas could continue through the weekend.
A storm that affected New England on Monday has left thousands of Eversource and National Grid residents without power.
More than 300,000 PG&E customers could be affected by the latest shutdown, which the company says could last several days.
Residents of 19 Californian counties could be affected by an electricity shutdown beginning on Wednesday and lasting through Thursday.
PG&E is investigating the cause of the outage and estimates that power will be restored later this afternoon.
A planned power outage to fix a fallen power line left customers without power in the early hours of this morning.
Severe weather affected many parts of the eastern United States on Thursday evening and Friday morning.
A table of outages by Eversource Energy said 82,536 of its Connecticut customers were affected by outages at around 7 a.m. ET today.
How to check the outage maps for Dominion and Pepco as the DMV area is left without power following a storm.
Some customers who were affected by the October 26 power shutoffs may be affected by the outages today.
PG&E's latest shutdown could see customers affected by the shutdown on Saturday left without power until Thursday.
City officials have prohibited outdoor water use and said residents should restrict indoor use "as much as possible" until the emergency is under control. The California blazes will continue to wreak havoc this week.