More than 1.4 million households and 3.8 million people had been affected by floods triggered by heavy rains in 12 southern provinces, the Department of Disaster Prevention and Mitigation said Saturday.
Government spokesperson Siripong Angkasakulkiat said in a news conference in Bangkok that 162 deaths have been confirmed in eight provinces, particularly in Songkhla province, which recorded at least 126 deaths.
The scale of the flooding and the high number of casualties have sparked widespread criticism of the government.
Prime Minister Anutin Charnvirakul told reporters on Saturday that he acknowledged the government's shortcomings in flood management, and said that when he visited the affected areas, he had apologised to the people "that the government was unable to take care and protect them".
Anutin said the government would begin distributing compensation payments to those affected by the floods next week.
The Department of Disaster Prevention and Mitigation reported that water levels began to recede across all affected provinces on Saturday morning.
Video showed local residents returning to their homes, which had previously been submerged, to inspect the damage.
Furniture and personal belongings were seen scattered across the floors.
The flooding, which began last weekend, caused severe disruptions, leaving thousands of people stranded, rendering streets impassable and submerging low-rise buildings and vehicles.
The death toll in Songkhla province, particularly in its largest city, Hat Yai, continued to rise as rescuers gained access to residential areas that had been previously submerged.
More bodies were recovered as rescue operations progressed.
Government spokesperson Siripong said King Maha Vajiralongkorn would donate 100 million baht ($A4.8 million) to Hat Yai Hospital, which suffered extensive damage from flooding, and that the king would grant royal support for the funerals of all victims who died from the flooding.
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