Powerful thunderstorms pound Houston with hail, shattering windows

More than 6 inches of rain have fallen on the fourth-largest city in the U.S., inundating streets and leaving scores of drivers stranded.
3:15 | 05/10/19

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Transcript for Powerful thunderstorms pound Houston with hail, shattering windows
We begin with severe storms and dangerous flooding as we head into the weekend and breaking news coming out of Houston. These images of a barge collision in the port of Houston. One vessel sinking late today. And fears of a possible chemical spill. Flash flooding from Texas to the Carolinas. First responders receiving calls for help from trapped drivers, and heavy downpours and fierce winds. 40 million people now bracing for extreme weather. Making its way east through mother's day. Maggie Rulli to lead us off. Reporter: Tonight, the powerful thunderstorms drenching the nation's fourth in Houston, wind-driven hail, up to baseball-sized shredding the siding off of homes. Shattering windows and knocking holes into windshields. Like I'm old and I've never seen hail like that before. Reporter: More than six inches of rain inundating streets and stranding scores of drivers. First responders racing to save a person trapped inside that overturned vehicle submerged in a flooded ditch. Manholes turning into geysers. More than 800 lightning strikes in 24 hours. Authorities are investigating whether lighting is to blame for this massive fire outside Houston, the home now a total loss. Winds gusting above 60 miles per hour across the region, the trash cans blowing away at this gas station. And this video from Baton Rouge showing the danger of driving into standing water. In a matter of moments, this prius starting to float bobbing up and down, nearby workers rescuing the woman inside. Maggie rult LI joining us. I want to get the crash between a barge and another vessel that shut down the Houston shipping channel and a check Cal leak, we could see a giant gash in the middle of the barge. Exactly, Tom. The details are just coming in. Right now, we know at least one of the vessels has sunk. Another one is carries 25,000 barrels on board. We do not know if that is leaking in the ocean or not. That a major concern. One fire boat has responded to the scene. Right now, no reports of any major. This is all on top of the severe weather threat in the area. It has people on high alert. We expect more rain into the weekend. It could be a long one ahead. The weather will affect the rescue and cleanup. Let's get to rob Marciano with the forecast. Good evening. Goods evening. The entire system is going to be moving east. At least one more wave of rain coming. The radar, four states in flood watches. Rain across north Texas. And dry across south Texas. That's not going to last long. Another wave coming through tapping the gulf of Mexico with warm moisture. Heavy rain there and during the day Sunday, a severe weather across Georgia and the Carolinas and here in the northeast a wet mother's day. Tom? Rob, we will stay tracking that weather through 9 weekend. Thank you.

This transcript has been automatically generated and may not be 100% accurate.

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