The heatwave enveloping the country saw temperatures in the North rise to high as 41 degrees and 40 degrees in the North and the Northeast respectively on Sunday.
In the capital, the mercury peaked at 39 degrees, according to the Meteorological Department.
It warned the public to brace for continued severe weather conditions, with increasing thundershowers and gusty winds expected in the North, the Northeast, the Central regional, the East and the South during the next few days.
In Sakhon Nakhon province’s Muang district, the body of day labourer Wisanukorn Onsritha, 39, was found in a hammock under a tree near Soi Chumchon Khamsa-ard 4 on Sunday evening.
He had suffered a heart attack.
His aunt, who was only identified as Boonkerd, 59, told police that Wisanukorn, who had separated from his wife in Trat province and returned to hometown a year ago, would sit in the area along with other day laborers to wait for jobs.
His fellow workers told police they returned to the spot at noon on Sunday following a goods-delivery job and Wisanukorn, who looked exhausted, went to sleep in the hammock under the tree.
As no more jobs came their way in the afternoon, they went home and left Wisanukorn to sleep there until someone tried to wake him up in the evening and found that he was dead.
The medical examiner said he died of a heart attack about four hours before his body was discovered.