Waist-deep water flooded some riverbanks and other parts of Thailand on Thursday after a tropical storm brought down trees and killed at least one person.
The heaviest rainfall of about 22 centimeters (8.5 inches) in 24 hours was recorded in the northeastern province of Ubon Ratchathani, where more than 5,000 people were displaced to higher ground shelters.
One person was reported dead and two injured in fallen trees in Sisaket province.
The remnants of Tropical Storm Noru hit central Vietnam before entering Thailand overnight, causing power outages and blowing off roofs and billboards. No immediate casualties were reported in Vietnam.
According to the Department of Disaster Prevention and Mitigation, more than 10,000 households have been affected by the floods in Thailand.
Rescue workers waded through waist-high water to distribute food and care packages to those trapped inside their homes.
In Nonthaburi Province, which borders the capital Bangkok, flooding from the Chao Phraya River has inundated several riverside areas.
Officials said more sandbags would be available to contain the flood waters.
The Bureau of Meteorology said Nord was further weakened, but warned that seasonal monsoon rains would continue, adding to conditions already flooding much of the country.
As the rain continued, several dams released water to prevent flooding, affecting lowland farmlands and communities downstream.
Before hitting Vietnam, Noru was a powerful typhoon that killed eight people in the Philippines, including five rescue workers who drowned trying to save people from rising floodwaters.