The massive storm that started out as Hurricane Sandy slammed into the East Coast and morphed into a huge and problematic system, putting more than 7.5 million homes and businesses in the dark and causing at least 18 deaths.
Here's a snapshot of what is happening, state by state.
North Carolina Gov. Beverly Perdue expanded a state of emergency to western North Carolina, which could see a foot of snow. A woman who was pulled from the Atlantic after abandoning a tall ship died. Power outages: 6,600.
The Long Island Sound flooded roads as the storm toppled trees and power lines Two people died, including an Easton firefighter who was killed when a tree fell on his truck. Power outages: more than 615,000.
Nearly all residents of flood-prone coastal communities in Kent County heeded calls to evacuate. The Rehoboth Beach and Dewey Beach resort communities were flooded. Power outages: more than 45,000.
High wind warnings and a lakeshore flood warning are in effect Tuesday and Wednesday in Chicago. City officials say Lake Shore Drive is expected to remain open.
A winter storm warning is in effect for three southeastern counties until Wednesday. In some areas, winds could gust up to 50 mph through Tuesday.
Wind gusts topped 60 mph, shutting down the port of Portland and knocking out power to homes and businesses. Power outages: more than 86,000.
Floodwaters swamped touristy Ocean City. In western Maryland, snow tied up traffic. A falling tree killed a man in Pasadena. Power outages: 290,000.
Strong winds and heavy surf led to mandatory evacuations in sections of coastal Dartmouth and Fall River and voluntary evacuations in other coastal communities. Power outages: more than 300,000.
High winds knocked out power to at least 60,000 homes and businesses.
Politicians canceled visits to the presidential swing state on Monday. Power outages: 179,000.
The center of the storm came ashore Monday evening near Atlantic City, which was cut off from the mainland by the storm surge along with other barrier islands, stranding residents who ignored warnings to evacuate. Hundreds of people were being evacuated after a levee broke in the northern New Jersey town of Moonachie. At least three deaths were reported. Power outages: more than 2.3 million.
A record storm surge that was higher than predicted along with high winds damaged the electrical system and plunged millions of people into darkness. Utilities say it could be up to a week before power is fully restored. The governor's office says there have been five storm-related deaths. A fire burned 50 houses in one flooded section of Queens. Power outages: more than 1.8 million.
The Cleveland area and northeast Ohio are getting slammed with rain and high winds. Snow was reported in some parts south of Cleveland and south of Columbus. Power outages: more than 250,000.
Wind and flooding closing more than 200 bridges and roads. Four people have died, including an 8-year-old boy who was killed when a tree limb fell on him. Power outages: 1.2 million.
Howling winds and storm surge forced mandatory and voluntary evacuations in low-lying and coastal communities. Providence's hurricane barrier performed well in one of its biggest tests. Power outages: 115,000.
Snow expected in higher elevations, where a freeze warning has been issued. High winds expected in many areas.
Winds knocked down trees and power lines, and schools were closed. Power outages: more than 10,000.
Utilities brought in crews to help restore power after high winds and snow. A curfew was ordered yesterday on Chincoteague Island. Power outages: more than 131,000.
Federal and local governments will remain closed Tuesday along with the courts, public schools and the Metro system that serves 1.2 million weekday customers. Widespread cancellations are expected at the region's three major airports. Power outages: 25,000.
Some areas are buried under more than a foot of snow. A woman was killed in a traffic crash. Power outages: more than 128,000.
A village along Lake Michigan has suggested residents evacuate this morning because of the possibility of dangerously high waves and flooding.
The Associated Press contributed to this report.