Dive Brief:

• Winter storms left almost 1 million customers without power along the U.S. East Coast on Monday, according to The Weather Channel. High winds, rain and snow from New Jersey to Alabama were responsible for at least three deaths, the New York Times reported.
• By Tuesday morning, most customers had power restored, but according to PowerOutage.US, as of 9:45 a.m. ET, more than 270,000 remained offline in Virginia.
• Dominion Energy had 390,000 customers without power at the height of the snowstorm on Monday, but in a Tuesday tweet said crews had restored power to more than 250,000 of those. "Today, we will be joined by crews from across the country to assist with restoration," the utility said.

Dive Insight:

While most of the Mid-Atlantic and Southeast were digging out from a winter storm on Tuesday, Dominion asked customers via Twitter to stay at home if you can ... Roads clear of accidents and stalled vehicles will help our crews reach worksites more quickly."

As of Tuesday morning, Dominion still had 140,000 customers without power, with most of those in northern Virginia, according to spokesman Rayhan Daudani. "For those without power, we know it was a cold, frustrating night. Help is on the way!" he tweeted.

"We have all hands on deck and are bringing in hundreds of crews from other utilities to help get the lights back on," he added.

According to local news station WUSA9, Potomac Electric Power Co. (Pepco) reported more than 15,000 customers without power during the storm. The utility's territory includes the District of Columbia and parts of Maryland. By Tuesday morning, the company's outage map showed less than 3,000 affected customers.

If you look at the map, "a lot of the damage and areas most impacted follow the storm bands we did end up seeing, with the further south you go in our region being the most impacted areas," Pepco spokesperson Sean Matthews said.

Duke Energy peaked at around 180,000 customers without power in North Carolina and South Carolina on Monday morning, according to the utility's outage map. By Tuesday, outages were reduced to about 26,000 customers.

According to a note on its website, all customers are expected back online Tuesday but "in our hardest hit communities where damage is extensive and access is hindered by challenging terrain or poor conditions, a small percentage of homes and businesses could extend beyond the initial estimates."