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By Wednesday more than 190,000 customers in Virginia and nearly 16,000 in North Carolina had lost electricity, according to . Appalachian Power, which serves a million customers in West Virginia, Virginia and Tennessee, said more than 5,700 workers were trying to restore power.

The region’s airports received several inches of snow, according to Scott Kleebauer, a meteorologist with the weather service's Weather Prediction Center.

“After a pretty quiet few seasons here, things have kind of picked back up again,” he said.

Nearly 7,000 flights were canceled or delayed across the United States, including almost 300 into Ronald Reagan ��ɫtv Airport near Washington, according to the flight-tracking site .

School was canceled throughout Virginia for a second straight day, and districts in the Baltimore and Washington areas also told students and teachers to take Wednesday off. Some families took the opportunity to go sledding outside the U.S. Capitol.

Flood threat

The snow-and-ice mix was expected to become rain by the afternoon as temperatures climbed. Concerns emerged about rain and melting snow washing into rivers and streams in regions already saturated from previous storms.

A flood threat through Thursday morning stretched from eastern Tennessee to southwestern Virginia into other parts of South, the weather service said.

“Our main concern once we get into Thursday will be potential flooding impacts as we see rivers and streams swell with the combined impact of melting snowpack and rain at the same time,” said Vance Joyner, a weather service meteorologist in Blacksburg, Virginia.

Hundreds of accidents

In Kentucky, snowy roads caused a head-on fatal crash Tuesday in Nelson County, south of Louisville. The driver of a car lost control going into a curve, crossed the center line and hit an oncoming semi truck head on, according to the county's emergency management director, Brad Metcalf. The driver died at the scene.

In Virginia, where Gov. Glenn Youngkin declared a state of emergency, the state police reported about 850 crashes on Tuesday and Wednesday, dozens of which involved injuries. Officials said it was not known if they were caused by the weather.

Maryland State Police reported 235 crashes and 185 inoperable or unattended vehicles.

In southern West Virginia, multiple crashes temporarily shut down several major highways Tuesday.

Mess to the west

Points farther west were not spared the wintry mess. A separate storm system was expected to dump heavy snow from Oklahoma to the Great Lakes on Wednesday, the weather service said.

Government offices were closed in parts of Oklahoma, Kansas and Missouri, and some universities in those states and Iowa canceled classes.

In Missouri, GoJet Airlines Flight 4427 slid off an icy taxiway at St. Louis Lambert International Airport, the airline said in a statement. The plane came to a stop in the grass, and no injuries were reported among the 27 people on board, it said. The runway was closed afterward, and passengers were bused to the terminal and reassigned to another aircraft.

On the West Coast, officials in Oregon’s Multnomah County extended a state of emergency through at least Thursday and said six emergency shelters would be open. Officials said 356 people went to the shelters Tuesday night. could dip to 10 degrees (minus 12 Celsius) in Portland, the weather service said.

An ice storm forecast for the Portland area early Thursday and Friday could challenge deliveries of flowers and other gifts for Valentine's Day. Temperatures plummeted earlier this week in Portland, which is more known for its rainfall.

Julia Duncan, a co-owner of Flowers in Flight, shrugged off the weather, saying the area endured ice storms in past winters and customers are willing to go the extra mile for the people they love.

“It’s Valentine’s Day!” Duncan said. “We’ll just have to wait and see what happens.”

“We're in the neighborhood where a lot of people tend to do pickups, too, and (we've) got a couple of drivers who are willing to drive in the ice and snow,” Duncan said. "So hopefully it won't affect us too much.”

California rain

Authorities in the state issued a voluntary evacuation warning for areas in Orange County, southeast of Los Angeles, that were affected by a wildfire last year over concerns about potential debris flows during an upcoming storm. The warning for Trabuco Canyon and other areas near the burn scar for the takes effect Thursday.

County officials said roads may be closed and urged residents to be prepared should a mandatory evacuation order become necessary.

California is preparing for an that could flood areas recently ravaged by wildfires. Light rain began falling Wednesday, and more than 10,000 customers lost power.

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Associated Press journalists from across the U.S. contributed to this report.