Explosions and fire overnight at a flooded chemical plant in Crosby, Texas

Families in the area were evacuated, and the company says it's too dangerous to return.
1:51 | 08/31/17

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Transcript for Explosions and fire overnight at a flooded chemical plant in Crosby, Texas
The storm triggering another intense situation tonight. Explosions and a fire at a flooded chemical plant. Overnight, that company saying it is still too dangerous to go back in. Families within a mile and a half have been evacuated. ABC's Clayton Sandell is there in Crosby, Texas tonight. Reporter: Tonight, fire and water. Flames burning through this flooded Arkema chemical plant in Crosby. Two explosions already, and no way to stop any more. Overnight smoke fumes sending fifteen sheriff's deputies to the hospital. Worried residents here are getting mixemessages from the government. Local officials downplay the danger. What does it mean for people's health? What does it men for people's health? You don't want to stand in smoke, do you? So the sheriff says it's like a campfire. Reporter: So the things burning there are no more dangerous than a campfire? I did not say that, sir. You don't want to inhale smoke. That's plain and simple. Reporter: But from FEMA, the message was more alarming. The plume is incredibly dangerous. Reporter: The chemicals used to make plastics are only stable if kept cold. This demonstration shows what happens if they're not. But under 6 feet of floodwater, the plant lost all power, killing the cooling system. When Arkema alerted authorities an explosion was likely, they evacuated everyone within a mile and a half. Others nearby tell us they are ready to go. I am packed to leave. I'm worried and I'm hoping they are telling us. Reporter: Why are you worried? Well, who would want to be breathing that, you know? Bad on your lungs. And collate B San sell joins us from Crosby, and what are you learning about the 15 officers you mentioned that were taken to the hospital? Reporter: They were checked out by doctors and tonight, the sheriff says all of them have been released and as for the plume coming from that plant, tonight, the e-patels us that tests show it appears to be not toxic.

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

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