High-intensity rains affected two villages in the region of Tana Toraja
The victim is a 21-year-old Thai salesman whose job brought him exposure to foreign tourists, the permanent secretary of the health ministry, Sukhum Kanchanaphimai, told a news conference.
Thailand has not yet had a death from the virus, although 28 patients have recovered and 14 are being treated in hospital.
The rapid spread of the coronavirus has fuelled fears of a pandemic, with six countries reporting their first cases this week as the World Health Organization raised its global risk alert to "very high".