Multiple tornadoes slammed western and central Massachusetts Wednesday, destroying buildings, flipping vehicles and leaving three people dead and 200 more injured.
At least three tornadoes struck the city of Springfield, Mass., alone, with a fourth unconfirmed twister possibly touching down in the city, Mayor Dominic J. Sarno said. Many of those storms also blasted the areas surrounding the city of more than 150,000 residents 90 miles west of Boston.
The Massachusetts twisters hit as unstable weather threatened the entire Northeast, bringing tornado watches to Philadelphia, New York and Boston.
The situation in Massachusetts was so bad that Gov. Deval Patrick declared a statewide state of emergency, calling up 1,000 members of the National Guard.
Two of the four fatalities in Massachusetts occurred in West Springfield, and there was one each in Springfield and Brimfield, a state official said, correcting earlier official statements.
Sources also disagreed on the number and location of confirmed tornado touch-downs in the state.
Patrick said early Wednesday evening that at least 19 Massachusetts communities were affected by rough weather and an unspecified number of twisters.
"Motorists should be off the roads," Patrick said. "There are downed limbs, downed wires."
Tens of thousands of the state's residents were without power, officials said.
Springfield officials were doing house-to-house checks on residents. Local and state officials hoped to do a fuller damage assessment on the affected regions in the morning daylight.
"With 19 communities affected, I can't imagine, given what we're hearing about some of the reports of damage, that there will not be federal assistance," said Sen. John Kerry, D-Mass.
Springfield-Area Tornado Damage: 'Like King Kong Took a Walk'
Video and still photos of apparent tornadoes hitting Springfield and elsewhere in Massachusetts showed funnel clouds, swirling winds and debris flying through the air.
Even after the twisters passed, cameras on buildings trained on the western part of Springfield showed broken trees, roof damage and overturned trucks. Roads were impassable in the hardest-hit areas and some people were stuck in their cars because of downed trees and power lines.
Skip Hynd described the scene just across the Connecticut River on Main Street in West Springfield, Mass.
"It looked like King Kong took a walk through there," he said. "Every side street is just about impassable."
Baystate Medical Center in Springfield was treating numerous injured people, some with serious force trauma injuries, spokeswoman Jane Albert told The Associated Press.
Late Wednesday evening, Springfield Mayor Sarno said the number of people hospitalized for weather-related causes in the city stood beyond 40.
At least 250 people were being sheltered overnight at the MassMutual Center arena in the city, Patrick said.
As those displaced residents assembled at the arena, they contrasted with teens in tuxedoes and dresses attending a high school prom upstairs at the same arena.
But the revelry of the prom for Minnechaug Regional High School of Wilbraham, Mass., did not reflect the fear many in the area felt hours earlier.
Betsy Hogan was on Memorial Bridge between Springfield and West Springfield when tornadoes began rolling through around 4:35 p.m.
"I was at the halfway mark on the bridge and the tractor trailer in front of me flipped right over," she told ABC News Springfield, Mass., affiliate WGGB. "I'm still shaking. ... Once that tractor trailer went I thought I was going to go too.
"Trees were down all over the place on Memorial and windows were blown out," she added.
Cassie Moore also was stuck on the bridge and sheltered the driver of the overturned truck in her compact car.
"It was the most frightening thing of my life," she told WGGB of the experience.
"The truck just started shaking and blew right over on its side," Moore said. "My little ... Honda Civic was just shaking and shaking and I thought, 'If this truck is going to be blown over, I'm going to go in the river.'"
Both she and the truck driver survived without major injuries, she said.
Louis Vega hustled diners to the center of the restaurant where he works in Springfield just as the storm blew in.
"No sooner than I ran back in the restaurant and warned everybody the tornado was coming it just hit like that," he said. "Windows started breaking, trees started coming down, roofs started coming off and it's pretty scary."
In Westfield, Mass., downed trees marked the twister's path.
"There's a lot of trees down in Westfield," said Jim Wiggs of Westfield Emergency Management. "We do have a missing part of the roof of a school. There's property damage up in the eastern part of the city. There's some property damage. We're still receiving some reports of trees falling on houses and power lines down throughout the city. It's an absolute, its a mess."
There have been an average of two tornadoes per year in Massachusetts since 1950, though none since 2008, according to the National Oceanic and Atmospheric Administration. The last fatalities from a tornado in the state were in 1995, when three died and 24 were injured by an EF4 tornado.
ABC News' Aaron Katersky, Linsey Davis and Richard Esposito, and ABC News Radio contributed to this report.