Hurricane Harvey lashes Texas

One week after Harvey slammed into southeast Texas as a Category Four hurricane, rescuers were still searching by air and by boat for people trapped in flooded homes.

A fresh blaze broke out late Friday at a chemical plant in Crosby, northeast of Houston, sending a giant plume of thick black smoke billowing into the sky.

And as floodwaters receded in Houston, the fourth most populous city in the United States, nearby cities such as Beaumont — which had lost its water supply — and Port Arthur struggled to recover. (AFP)

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Port Aransas, Texas

Father Kris Bauta celebrates Mass at St. Joseph Catholic Church which was damaged from the effects of Hurricane Harvey, Sunday, Sept. 3, 2017, in Port Aransas, Texas. The church and Port Aransas is still with out electricity. (Photo: Eric Gay/AP)

Houston, Texas

Joan Finmore looks out as she takes a break from sorting items at a friend’s flooded home Saturday, Sept. 2, 2017, in Houston, Texas. (Photo: Gregory Bull/AP)

Houston, Texas

This still image taken from video provided by KTRK-TV shows firefighters battling a blaze at a building still surrounded by Harvey’s floodwaters in Houston on Saturday, Sept. 2, 2017. Houston TV station KTRK reported Saturday that firefighters were being hampered by burglar bars on windows around the building, which appears to be a multi-family dwelling. Parts of west Houston are still inundated from the release of floodwater from nearby reservoirs that are designed to catch storm runoff. (Photo: KTRK-TV via AP)

Freeport, Texas

Trees rise from a field submerged by water from the flooded Brazos River in the aftermath of Hurricane Harvey Friday, Sept. 1, 2017, near Freeport, Texas. (Photo: Charlie Riedel/AP)

Tivoli, Texas

Motorists watch as flood waters from the Guadalupe River spill over Texas Highway 35, Friday, Sept. 1, 2017, in Tivoli, Texas, north of Rockport. (Photo: Eric Gay/AP)

Houston, Texas

A family that wanted to remain anonymous moves belongings from their home flooded by Harvey in Houston, Texas, Aug. 31, 2017. (Photo: Rick Wilking/Reuters)

Port Arthur, Texas

Vehicles sit amid leaked fuel mixed in with flood waters caused by Tropical Storm Harvey in the parking lot of Motiva Enterprises LLC in Port Arthur, Texas, Aug. 31, 2017. (Photo: Adrees Latif/Reuters)

Houston, Texas

Members of the Nguyen family return to their home for the first time since Harvey floodwaters arrived in north western Houston, Texas, Aug. 31, 2017. (Photo: Rick Wilking/Reuters)

Houston, Texas

A hand-made sign warns off looters in a neighborhood flooded by Harvey in Houston, Texas, Aug. 31, 2017. (Photo: Rick Wilking/Reuters)

Crosby, Texas

A fire burns at the flooded plant of French chemical maker Arkema SA in Crosby, Texas, Aug. 31, 2017. (Photo: Adrees Latif/Reuters)

Beaumont, Texas

An evacuee is rescued by a Coast Guard helicopter from Tropical Storm Harvey flood waters in Beaumont, Texas, Aug. 30, 2017. (Photo: U.S. Coast Guard/Petty Officer 3rd Class Brandon Giles/Handout via Reuters)

Orange, Texas

Cars drive through flooded streets from Tropical Storm Harvey in Orange, Texas, Thursday, Aug. 31, 2017. (Photo: Gerald Herbert/AP)

Port Arthur, Texas

Evacuees wait at Woodrow Wilson Middle School for word about what shelter they will be sent to after they were evacuated from the flooding of Hurricane Harvey on Aug. 30, 2017 in Port Arthur, Texas. (Photo: Joe Raedle/Getty Images)

Houston, Texas

A aerial view of downtown on August 29, 2017 in Houston, Texas. (Photo: Marcus Yam/Los Angeles Times)

Houston, Texas

Residents wade with their belongings through flood waters brought by Tropical Storm Harvey in Northwest Houston, Texas, Aug. 30, 2017. (Photo: Adrees Latif/Reuters)

Orange, Texas

A woman looks out of the window of the Golden Years senior home as rescuers wait for a high water vehicle to rescue several elderly people who are inside on the second floor, during flooding from Tropical Storm Harvey in Orange, Texas, Wednesday, Aug. 30, 2017. (Photo: Gerald Herbert/AP)

Houston, Texas

Floodwaters fill the road running through the Lakes On Eldridge North subdivision in the aftermath of Tropical Storm Harvey on Wednesday, Aug. 30, 2017, in Houston, Texas. (Photo: Brett Coomer/Houston Chronicle via AP)

Houston, Texas

People wait in line to buy groceries at a Food Town during the aftermath of Hurricane Harvey on August 30, 2017 in Houston, Texas. (Photo: Brendan Smialowski/AFP/Getty Images)

Houston, Texas

A cat tries to find dry ground around an apartment complex after it was inundated with water following Hurricane Harvey on August 30, 2017 in Houston, Texas. (Photo: Scott Olson/Getty Images)

Port Arthur, Texas

Volunteer rescuer workers help a woman from her home that was inundated with the flooding of Hurricane Harvey on Aug. 30, 2017 in Port Arthur, Texas. (Photo: Joe Raedle/Getty Images)

Texas City, Texas

Rainwater from Hurricane Harvey surrounds oil refinery storage tanks in this aerial photograph taken above Texas City, Texas on Wednesday, Aug. 30, 2017. (Photo: Luke Sharrett/Bloomberg via Getty Images)

Orange, Texas

David Gonzalez comforts his wife Kathy after being rescued from their home flooded by Tropical Storm Harvey in Orange, Texas, Aug. 30, 2017. (Photo: Jonathan Bachman/Reuters)

Houston, Texas

Residents evacuate their homes near the Addicks Reservoir as floodwaters from Tropical Storm Harvey rise Tuesday, Aug. 29, 2017, in Houston. (Photo: David J. Phillip/AP)

Houston, Texas

Chris Gutierrez, second from right, helps his grandmother, Edelmira Gutierrez, down the stairs of their flooded house and into a waiting fire department truck in the Concord Bridge neighborhood as Addicks Reservoir surpasses capacity due Tropical Storm Harvey, Tuesday, Aug. 29, 2017, in Houston. (Photo: Michael Ciaglo/Houston Chronicle via AP)

Houston, Texas

Texas Army National Guard members Sergio Esquivel, left, and Ernest Barmore carry 81-year-old Ramona Bennett after she and other residents were rescued from their Pine Forest Village neighborhood due to high water from Hurricane Harvey August 29, 2017 in Houston, Texas. Harvey, which made landfall north of Corpus Christi late Friday evening, is expected to dump upwards to 40 inches of rain in areas of Texas over the next couple of days. (Photo: Erich Schlegel/Getty Images)

Houston, Texas

Water from Addicks Reservoir flows into neighborhoods as floodwaters from Tropical Storm Harvey rise Tuesday, Aug. 29, 2017, in Houston. (Photo: David J. Phillip/AP)

Houston, Texas

A woman holds a girl as her family arrives to high ground by boat due to floods caused by Tropical Storm Harvey along Tidwell Road in east Houston, Texas, U.S. August 28, 2017. (Photo: Adrees Latif/Reuters)

Houston, Texas

Interstate 10 is closed due to floodwaters from Tropical Storm Harvey Tuesday, Aug. 29, 2017, in Houston. (Photo: David J. Phillip/AP)

Houston, Texas

Samaritans help push a boat with evacuees to high ground during a rain storm caused by Tropical Storm Harvey along Tidwell Road in east Houston, Texas, Aug. 28, 2017. (Photo: Adrees Latif/Reuters)

Houston, Texas

People line up for food and others rest at the George R. Brown Convention Center that has been set up as a shelter for evacuees escaping the floodwaters from Tropical Storm Harvey in Houston, Texas, Tuesday, Aug. 29, 2017. (Photo: LM Otero/AP)

Houston, Texas

Residents wade through floodwater after Hurricane Harvey inundated the Texas Gulf coast with rain causing widespread flooding, in Houston, Texas, Aug. 28, 2017. (Photo: Nick Oxford/Reuters)

Houston, Texas

Robert Salgado, 2, sleeps on the floor at the George R. Brown Convention Center that has been set up as a shelter for evacuees escaping the floodwaters from Tropical Storm Harvey in Houston, Texas, Tuesday, Aug. 29, 2017. (Photo: LM Otero/AP)

Houston, Texas

A woman holds her dog as she arrives to high ground after evacuating her home due to floods caused by Tropical Storm Harvey along Tidwell Road in east Houston, Texas, Aug. 28, 2017. (Photo: Adrees Latif/Reuters)

Corpus Christi, Texas

President Donald Trump (C) waves next to first lady Melania Trump upon arrival prior to receiving a briefing on Tropical Storm Harvey relief efforts in Corpus Christi, Texas, U.S., August 29, 2017. (Photo: Carlos Barria/Reuters)

Houston, Texas

Residents wade through flood waters from Tropical Storm Harvey in Beaumont Place, Houston, Texas on Aug. 28, 2017. Photo: Jonathan Bachman/Reuters)

Refugio, Texas

Genice Gipson comforts her lifelong friend, Loretta Capistran, outside of Capistran’s apartment complex in Refugio, Texas, on Monday, Aug. 28, 2017. “We got to be strong, baby,” Gipson told Capistran. (Photo: Nick Wagner/Austin American-Statesman via AP)

Houston, Texas

Flood victims rest at a shelter in the George R. Brown Convention Center during the aftermath of Hurricane Harvey on Aug. 28, 2017 in Houston, Texas. (Photo: Brendan Smialowski/AFP/Getty Images)

Refugio, Texas

An apartment unit sits destroyed from Hurricane Harvey in Refugio, Texas, Monday, Aug. 28, 2017. (Photo: Nick Wagner/Austin American-Statesman via AP)

Houston, Texas

Demetres Fair holds a towel over his daughter Damouri Fair, 2, as they are rescued by boat by members of the Louisiana Department of Wildlife and Fisheries and the Houston Fire Department during flooding from Tropical Storm Harvey in Houston, Monday, Aug. 28, 2017. (Photo: Gerald Herbert/AP)

Houston, Texas

A truck driver walks past an abandoned truck while checking the depth of an underpass during the aftermath of Hurricane Harvey Aug. 28, 2017 in Houston, Texas. (Photo: Brendan Smialowski/AFP/Getty Images)