Harvey Causes Unprecedented Rains in Texas

Houston Police SWAT officer Daryl Hudeck carries Catherine Pham and her 13-month-old son Aiden after rescuing them from their home surrounded by floodwaters from Tropical Storm Harvey, Aug. 27, 2017, in Houston.

Conception Casa, center, and his friend Jose Martinez, right, check on Rhonda Worthington after her car become stuck in rising floodwaters from Tropical Storm Harvey in Houston, Texas, Monday, Aug. 28, 2017. The two men were evacuating their home that had become flooded when they encountered Worthington's car floating off the road. (AP Photo/LM Otero)

Residents are rescued from their homes surrounded by floodwaters from Tropical Storm Harvey on Sunday, Aug. 27, 2017, in Houston, Texas. (AP Photo/David J. Phillip)

Boats that sunk in the wake of Hurricane Harvey are surrounded by floating debris Sunday, Aug. 27, 2017, in Rockport, Texas. (AP Photo/Eric Gay)

Residents pick through needed items at a make-shift aid station, Sunday, Aug. 27, 2017, in Rockport, Texas. A group from the Texas Rio Grande Valley created station for those in need following Hurricane Harvey. (AP Photo/Eric Gay)

People push a stalled pickup through a flooded street in Houston, after Tropical Storm Harvey dumped heavy rains, Sunday, Aug. 27, 2017. The remnants of Harvey sent devastating floods pouring into Houston on Sunday as rising water chased thousands of people to rooftops or higher ground. (AP Photo/Charlie Riedel)

Moses Juarez, left, and Anselmo Padilla wade through floodwaters from Tropical Storm Harvey, in Houston, Texas, Aug. 27, 2017.

Flooded downtown is seen from a high rise along Buffalo Bayou after Hurricane Harvey inundated the Texas Gulf coast with rain causing widespread flooding, in Houston, Texas, Aug. 27, 2017, in this picture obtained from social media.

Two people walk down a flooded section of Interstate 610 in floodwaters from Tropical Storm Harvey, Aug. 27, 2017, in Houston, Texas.

Interstate highway 45 is submerged from the effects of Hurricane Harvey seen during widespread flooding in Houston, Texas, Aug. 27, 2017.

Residents wade through floodwaters from Tropical Storm Harvey, Aug. 27, 2017, in Houston, Texas.

Interstate highway 45 is submerged from the effects of Hurricane Harvey seen during widespread flooding in Houston, Texas, Aug. 27, 2017.

A rescue worker carries two dogs to safety after evacuating their family from floodwaters from Tropical Storm Harvey Sunday, Aug. 27, 2017, in Houston, Texas.

A driver works his way through a maze of fallen utility poles damaged in the wake of Hurricane Harvey, Aug. 26, 2017, in Taft, Texas.

A car is surrounded by floodwaters from Hurricane Harvey in Point Comfort, Texas, Aug. 26, 2017.

A condominium complex is reduced to rubble after Hurricane Harvey struck in Rockport, Texas, Aug. 26, 2017.

A plane lies upside down at the airport after Hurricane Harvey struck near Fulton, Texas, Aug. 26, 2017.

A home damaged by Hurricane Harvey remains surrounded by flood waters, Aug. 26, 2017, in Rockport, Texas.

Cars sit abandoned at a flooded gas station after Hurricane Harvey made landfall on the Texas Gulf coast and brought heavy rain to the region, in Houston, Aug. 26, 2017.

Lisa Rehr holds her four-year-old son Maximus, after they lost their home to Hurricane Harvey, as they await to be evacuated from Rockport, Texas, Aug. 26, 2017.