Sayan Kijmano, chief of the Phang Nga Disaster Prevention and Mitigation Office, said the accident happened early in the morning on Ao Wek road in Ban Thung La-ong village in Tambon Bang Wan in Khura Buri district.
He said the flash floods washed off part of the road, leaving a two-metre-wide gap and the driver of the pickup could not stop in time before plunging into it.
He said the driver was not injured and the vehicle has been salvaged.