PHOENIX (KSAZ) - Houston, Texas is overwhelmed by more than a foot of rain.
Flash flooding has destroyed roadways, neighborhoods and kicked hundreds of people out of their homes.
"There will be some areas that aren't touched, other areas that are devastated," David Boyd said. "It's unbelievable damage that water can do and once it gets inside the houses, you've got mold, mildew flooring, everything that's just going to be totaled."
With the devastation so high, the American Red Cross is asking for help from other states and Boyd is one of three volunteers from Arizona heading that way.
"I'll go as a shelter supervisor and I'll either be on a day shift or night shift and supervise the work at the shelter," he said.
The first priority is to give people who are now homeless a safe place to stay.
"Water, clothes, if needed, food three meals a day, showers, yeah, we just get them out of the weather," he said.
David's job is to monitor the shelters that cater to 100 people per night.
"We have nurses that will help them with any lost medication and supplies," he said. "We have mental health available. It's just getting them back on their feet heading in the right direction."
David's deploying for three weeks, but he says because of the rain Houston is expected to get tonight and tomorrow, he may have to extend his time.