Hurricane Harvey slams Texas

A rescue helicopter hovers in the background as an elderly woman and her poodle use an air mattress to float above flood waters from Tropical Storm Harvey while waiting to be rescued from Scarsdale Boulevard in Houston, Texas. REUTERS/Adrees Latif

Residents use a truck to navigate through flood waters in Houston. REUTERS/Adrees Latif

The Duong family walks along Interstate 45 while escaping flood waters in Houston, Texas. REUTERS/Adrees Latif

People are rescued from flood waters from Hurricane Harvey on an air boat in Dickinson, Texas. REUTERS/Rick Wilking

Interstate Highway 45 is submerged in Houston. REUTERS/Richard Carson

Area residents use a kayak to rescue motorists stranded on Interstate Highway 45 in Houston. REUTERS/Richard Carson

A Texas National Guard soldier carries a woman on his back as they conduct rescue operations in flooded areas around Houston, Texas. 1Lt. Zachary West, 100th MPAD/Texas Military Department/Handout via REUTERS

Jesus Rodriguez rescues Gloria Garcia after rain flooded Pearland, in the outskirts of Houston. REUTERS/Adrees Latif

Evacuees are transported to the George R. Brown Convention Center in Houston. REUTERS/Nick Oxford

Evacuees Danielle White and her husband Lorenzo White wait to get into of the George R. Brown Convention Center in Houston. REUTERS/Nick Oxford

Sterling Broughton is moved from a rescue boat onto a kayak in Dickenson, Texas. REUTERS/Rick Wilking

Flooded downtown is seen from JP Morgan Chase Tower after Hurricane Harvey inundated the Texas Gulf coast with rain causing widespread flooding, in Houston, Texas. Mandatory credit: Christian Tycksen via REUTERS

People walk through water to a staging area to evacuate in Dickinson, Texas. REUTERS/Rick Wilking

Flooded downtown Houston is seen from a high rise along Buffalo Bayou in Houston, Texas. Mandatory credit: Twitter/@caroleenarn via REUTERS

Texas National Guard soldiers arrive to aid residents in heavily flooded areas from the storms of Hurricane Harvey in Houston, Texas. Lt. Zachary West, 100th MPAD/Texas Military Department/Handout via REUTERS

The downtown skyline is reflected in the flood water at Buffalo Bayou Park in Houston, Texas. REUTERS/Nick Oxford

Jesus Rodriguez rescues Gloria Garcia after rain flooded Pearland, in the outskirts of Houston, Texas. REUTERS/Adrees Latif

A woman carries her dog into a collector's vintage military truck to evacuate from flood waters in Dickinson, Texas. REUTERS/Rick Wilking

A stranded motorist escapes floodwaters on Interstate 225 in Houston, Texas. REUTERS/Nick Oxford

Texas National Guard soldiers search by boat for stranded residents in Houston, Texas. Lt. Zachary West, 100th MPAD/Texas Military Department/Handout via REUTERS

Texas Guardsmen from the 386th Engineer Battalion pick up large debris in Victoria, Texas. U.S. Army National Guard/Capt. Martha Nigrelle/Handout via REUTERS

Texas National Guard soldiers aid residents in heavily flooded areas in Houston, Texas. Lt. Zachary West, 100th MPAD/Texas Military Department/Handout via REUTERS

A woman uses a coat hanger to try and retrieve an item from a destroyed house in Fulton. REUTERS/Rick Wilking

A man walks through water and onto the main road after surveying his property in Rockport. REUTERS/Adrees Latif

Lisa Rehr holds her four-year old son Maximus, after they lost their home to Hurricane Harvey, as they await to be evacuated with their belongings from Rockport. REUTERS/Adrees Latif

An abandoned Hummer is covered in floodwaters on Interstate 610 after Hurricane Harvey inundated the Texas Gulf coast with rain, in Houston, Texas. REUTERS/Nick Oxford

Julie holds her dog Pee-wee as they stand in line to be evacuated to Austin after losing their home to Hurricane Harvey in Rockport, Texas. REUTERS/Adrees Latif

Housing surrounded by flood waters caused by Hurricane Harvey is seen from a U.S. Coast Guard helicopter during an overflight from Port Aransas to Port O'Connor, Texas. U.S. Coast Guard/Petty Officer 3rd Class Johanna Strickland/Handout via REUTERS

People stand on a sinking boat awaiting rescue from a U.S. Coast Guard helicopter, after Hurricane Harvey passed near Port Aransas, Texas. U.S. Coast Guard/Petty Officer 2nd Class Cory Mendenhall/Handout via REUTERS

Boats are seen destroyed in a storage facility hit by Hurricane Harvey in Rockport, Texas. REUTERS/Adrees Latif

A man waits in a wheelchair in a hurricane shelter after Hurricane Harvey struck Rockport, Texas. REUTERS/Rick Wilking

An abandoned vehicle is covered by flood waters on Interstate 610 in Houston, Texas. REUTERS/Nick Oxford

A condominium complex reduced to rubble in Rockport. REUTERS/Rick Wilking

Richard Hardy looks over damage from a tornado that spun off of Hurricane Harvey in Katy, Texas. REUTERS/Nick Oxford

Damage left behind by a tornado that spun off of Hurricane Harvey in Katy, Texas. REUTERS/Nick Oxford

Tim Freiberg moves through what was his garage in Rockport, Texas. REUTERS/Rick Wilking

A car surrounded by floodwaters in Point Comfort. REUTERS/Rick Wilking

A wall of the Fairfield Inn is seen partially missing in Rockport. REUTERS/Rick Wilking

Dead cows killed in Hurricane Harvey lie on highway 35 near Fulton. REUTERS/Rick Wilking

Business owner and resident Carlos Lopez assesses damage after arriving at his electronics repair shop in Rockport. REUTERS/Adrees Latif

A damaged oil tank near Seadrift. REUTERS/Rick Wilking

A plane lies upside down at the airport near Fulton. REUTERS/Rick Wilking

A resident picks up debris from the road the morning after in Rockport. REUTERS/Adrees Latif

Boats pushed ashore in Port Lavaca. REUTERS/Rick Wilking

A ranch house surrounded by floodwaters near Port Lavaca,. REUTERS/Rick Wilking

A collapsed overhead gantry lies across Interstate 37, blocking the highway, in Corpus Christi, Texas. REUTERS/Mohammad Khursheed

A car crushed by a huge tree in Rockport. REUTERS/Rick Wilking

Women are illuminated by the light of a smart phone as they seek refuge in the Good Samaritan Rescue Mission in Corpus Christi. REUTERS/Adrees Latif

A man assesses damage to the First Baptist Church in Rockport. REUTERS/Adrees Latif

A cow struggles to keep its head above floodwaters near Fulton. REUTERS/Rick Wilking

Crockery in a cupboard and an intact dining room set are seen at a roofless house in Fulton. REUTERS/Rick Wilking

A plane's tail is seen bent at the airport near Fulton. REUTERS/Rick Wilking

An emergency crew removes a fallen tree blocking a roadway in Corpus Christi. REUTERS/Mohammad Khursheed

Stewart Adams, of San Marcos, Texas, plays in the wind in Corpus Christi. REUTERS/Adrees Latif

Traffic lights lie on a street after being knocked down in Corpus Christi. REUTERS/Adrees Latif

Craig "Cajun" Uggen, 57, nearly floods his truck as Hurricane Harvey comes ashore in Corpus Christi. Minutes later, high winds blew off the camper carrying all of his belongings. REUTERS/Brian Thevenot

Hurricane Harvey is pictured off the coast of Texas. NASA/ via REUTERS