At least two people have died as severe weather has struck the East Coast.
Markin Russell, 28, died after being struck by lightning in Florence, Alabama, on Monday, according to police.
Evan Kinley, 15, died after a tree fell on him outside his grandparents' home in Anderson, South Carolina, on Monday, according to local officials.
Monday's storm brought heavy rain, damaging winds, massive hail and powerful thunder to the East Coast. The storms led to the cancellation or postponement of more than 10,000 flights across the country on Monday in cities including Atlanta, New York, Baltimore and Washington, DC.
Straight-line wind speeds reached 71 mph in Georgia and 63 mph in Maryland, where power lines and trees collapsed. Grapefruit-sized hailstones have been reported in Virginia.
In Westminster, Maryland, fallen power poles trapped 33 adults, 14 children and dogs inside cars on a major highway. They were later rescued once the power lines lost power, officials said.
Among those rescued were Lori and Christopher Ginger and their two grandchildren, who said they were stuck in their car for five hours.
The Ginger family told ABC News they were initially terrified as they saw power lines and telephone poles falling one by one around them like dominoes, and felt the wind rocking their car from side to side.
They passed the time by telling jokes and the children watched videos on their phones, Christopher Ginger said.
He added: “I enjoyed spending time with them. Considering the situation we were in, they were comfortable.”
On Tuesday, heavy rain, flooding and a confirmed tornado hit eastern Massachusetts, leaving some drivers stranded on the road.
Up to 8 inches of rain was reported in some areas. Flood watches are in effect.
Meanwhile, storms are brewing in two other areas on Tuesday.
Residents from Jackson, Mississippi, to Savannah, Georgia, could see isolated severe storms, and another system is increasing the risk of storms in Colorado, Kansas and Nebraska.
From Wednesday into Thursday, the threat of severe storms will be from Missouri to Tennessee. Damaging winds, flash flooding, and isolated tornadoes will be possible from St. Louis to Little Rock to Nashville.
ABC News' Faith Abobi, Matt Foster and Lauren Minor contributed to this report.
