All three districts in Phuket province, including the city of the same name, have been affected by torrential rain.
In addition to flooding, several mudslides and landslides have occurred. Pictures and videos on social media show cars partially buried in mud.
Thailand's state weather agency is warning of continued heavy rain and possible flooding and landslides in the south of the country.
Flooding has been reported in many parts of Thailand since mid-September. At least 80 people have died, according to government figures.
