HOUSTON (AP) — The Latest on Tropical Depression Harvey (all times local):

4:15 a.m.

Beaumont, Texas, has lost its water supply because of Harvey.

Officials there say the city has lost service from its main pump station due to rising waters of the Neches River caused by Harvey.

The pump station is along the river and draws water from it as a main source for the city's water system.

The officials added in their statement early Thursday that the city has also lost its secondary water source at the Loeb wells in Hardin County. They say there's no water supply for Beaumont's water system at this time.

They say they must wait until the water levels from Harvey recede before determining the extent of damage.

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1:20 a.m.

Major dangers for the U.S. Gulf Coast area loomed Wednesday with the threat of major flooding further east near the Texas-Louisiana line and an explosion at a Texas chemical plant as Harvey's floodwaters began receding in the Houston area after five days of torrential rain.

As the water receded, Houston's fire department said it would begin a block-by-block search Thursday of thousands of flooded homes. The confirmed death toll climbed to at least 31 on Wednesday, including six family members — four of them children — whose bodies were pulled Wednesday from a van that had been swept off a Houston bridge into a bayou.

Another crisis related to Harvey emerged at a chemical plant about 25 miles (40 kilometers) northeast of Houston. A spokeswoman for the Arkema Inc. plant in Crosby, Texas, said late Wednesday that the flooded facility had lost power and backup generators, leaving it without refrigeration for chemicals that become volatile as the temperature rises.