Transcript for Hurricane Harvey raises concerns over toxic water
He says there's still 200 people waiting to be rescued. Eva pilgrim is in Houston. Looking at those concerns over toxic water this morning, and, Eva, what is in that water? Reporter: That's the big question. A toxic coup. Concerns about sewage seeping in. What the water looks like here. It's a little murky. Not exactly anything you want to be in and those rising floodwaters also wildlife are coming in. Let me show you this guy over here. If I can get him to stop, this is a little crawfish. There he is, he's crawling around. That crawfish was in this water and you have to remember, this is bayou water that's flooding. That's everything that's in the bayou means it's moving out, that's the crawfish, the snakes and the alligators. You'll notice I'm not standing far in the water. Just a very short distance from here, check this out, an alligator. A woman got this video of a alligator creeping around in her backyard. Wildfire officials say these guys are just doing what they can to survive and for a lot of them that means moving to higher ground. And this morning, because of all the things that are in this water, this area is under a public health emergency, George. We'll talk to Jen Ashton about that. Eva, thanks very much.
This transcript has been automatically generated and may not be 100% accurate.