Tropical storm Harvey to slam Louisiana next

Twelve years ago today, Hurricane Katrina devastated New Orleans; residents are fearful the same could happen with Harvey as heavy rain and evacuations are already underway.
3:46 | 08/30/17

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Transcript for Tropical storm Harvey to slam Louisiana next
And Texas is not the only state under threat tonight. Harvey is about to slam Louisiana. It's already triggers heavy rain, and so much more. Special fear in New Orleans where hurricane Katrina struck 12 years ago together, and fears over the pumps that are supposed to keep the city safe. ABC's gio Benitez is in girls tonight tonight. # Reporter: Tonight in new Orleans, residents all too familiar with flooding, are once again using sand bags on the 12th anniversary of hurricane Katrina. It brought back a lot of memories when Katrina it hit and what we all experienced. It really evoked a lot of emotions and heartbreak. Reporter: As a flash flood watch extends from Texas through Louisiana all the way to the Florida panhandle. We're asking everybody to stay alert and to stay vigilant tonight. Reporter: Harvey expected to make landfall near the texas/louisiana state line. Evacuations there overnight. Our Steve osunsami with some of those families. Reporter: We are at the Lake Charles convention center where they are moving other families from other shelters to this one because of the rising water around those buildings. But just outside is a body of water, a lake, that they're watching overnight. Reporter: And the concern here in New Orleans, problems with 14 water pumps last week. This is one of the main pumping stations here in New Orleans, you can just see how the rain water drains into this canal, and then is pumped into the lake. One of the pumps, overheated earlier and now engineers are working around the clock to make sure as many pumps as possible are working. Residents tonight counting on those pumps working. Bob Ruppel survived Katrina, he lost everything 12 years ago. Are you worried about the pumps failing even in this storm? Oh, lord, yes. It's not something you want to hear. And gio Benitez joins us live now in front of one of those pumps. Keeping New Orleans safe, how confident are officials in all of those pumps tonight? Reporter: Well, Tom, as this rain comes down here, they are feeling very confident about it. They have 120 pumps here. Most of them are working, but about a dozen of them are not, so officials are trying to get those fixed right now, Tom. Gio Benitez for us tonight. Gio, thank you. And as we reported, the historic flooding from tropical storm Harvey has transformed the city. Take a look just behind me. You can see what looks like a river with the downtown skyscrapers in the background, and here's is the same scene before Harvey. It's really a very popular park. Eleanor Tinsley, the change in landscape is staggering. And ABC's senior meteorologist, rob Marciano, joins us from Katy, Texas with what the hurricane still has in store. Reporter: Thankfully, the rain lifting now, but wind picking up. It's about 50 miles south of Port Arthur, Texas, and heading towards the border. Look at the heavy rain falling in Louisiana, and the heaviest it will be across southwest Louisiana as it comes on shore, and passes Alexandria. That moisture getting up into the mid Mississippi valley. We have widespread flash flood watches and about 5 to 10 inches falling, and moefs that east of Houston, and as you know, the water in many areas still rising, Tom. Millions still in the path. All right, rob. Thank you. And a programming note tonight, on Thursday, Disney will hold a day of giving. It includes all of to our programs and our partners throughout the day on ABC, from aur affiliates to aur broadcast, "Gma," "Nightline" and right here at "World news tonight." As well as free yp form, radio Disney, and our platforms. Our Houston station have committed with Disney, $1 million to the red cross in support of hurricane relief. And those affected by hurricane Harvey through the red cross will get some giving. You can text the word Harvey to 90999 to make a $10 donation or visit for other ways to

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

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