In Houston, Red Cross volunteers are handing out snacks along with water to those forced to leave their homes.
"It's pretty dangerous to say the least” said Ian Dyar, a regional disaster officer with the Red Cross.
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He is one of many from metro Detroit who are providing food and shelter to those in Texas.
"Last night we had 1500-1800 residents in shelters and we expect that number to go up. We'll be continuing to receive volunteers here and a lot of them are flying into Dallas, Austin, San Antonio."
At a Houston Red Cross chapter office, Dyar says more than 150 people are giving help around the clock and thousands more volunteers are coming.
"The focus is on mass care sheltering and feeding those evacuated or rescued from their homes," said Dyar.