Historic, deadly flooding in Texas

Vehicles are left stranded on Texas State Highway 288 in Houston, Texas, on May 26, 2015.

Vehicles left stranded on a flooded Interstate 45 in Houston, Texas on May 26, 2015.

Vehicles are left stranded on a flooded Interstate 45 in Houston, Texas on May 26, 2015.

The flooded Whole Earth Provisions Company on Lamar Street is shown after days of heavy rain on May 25, 2015 in Austin, Texas.

Flooding in Houston, Texas on May 26, 2015.

A little girl looks at a flooded car downtown in Houston, Texas on May 26, 2015.

Cars remain stranded along a flooded section of Interstate 45 after heavy rains overnight in Houston, Tuesday, May 26, 2015.

Flood waters spread across Zilker park near downtown Austin, Texas, on May 25, 2015.

Magdiel Paz trims damage trees at the Silver Springs Apartments in North Austin, Texas, Sunday, May 24, 2015. Record rainfall was wreaking havoc across a swath of the U.S. Midwest on Sunday, causing flash floods in normally dry riverbeds, spawning tornadoes and forcing at least 2,000 people to flee.

People walk by a damaged roof at the Silver Springs Apartments in North Austin, Texas, Sunday, May 24, 2015. Record rainfall was wreaking havoc across a swath of the U.S. Midwest on Sunday, causing flash floods in normally dry riverbeds, spawning tornadoes and forcing at least 2,000 people to flee. (Ricardo B. Brazziell/Austin American-Statesman via AP) AUSTIN CHRONICLE OUT, COMMUNITY IMPACT OUT, INTERNET AND TV MUST CREDIT PHOTOGRAPHER AND STATESMAN.COM, MAGS OUT   (Ricardo B. Brazziell / AP)

The Iron wood group workers clear debris from the Silver Springs Apartments in North Austin, Texas, Sunday, May 24, 2015. Record rainfall was wreaking havoc across a swath of the U.S. Midwest on Sunday, causing flash floods in normally dry riverbeds, spawning tornadoes and forcing at least 2,000 people to flee.

David Barry consoles his 5-year-old daughter, Marley, while she tries to sleep in a flood evacuee room created at the San Marcos Activity Center, Sunday May 24, 2015, in San Marcos, Texas.

Franki Lopez, center, mops muddy flood water from her families home in the Blanco Gardens neighborhood of San Marcos, Texas, with the help of family friends Sunday, May 24, 2015, in San Marcos, Texas.