The fever has claimed 83 fatalities so far or 0.09 per cent of patients, mostly those who suffer from chronic diseases.
The number of cases in July alone hit 5,770.
In a press conference on Sunday, Minister Pradit Sinthawanarong warned that people of all ages are at risk, but symptoms for children, chubby kids, pregnant women and the elderly could be more severe.
Ten provinces are under close watch, with the increasing rate of infection: Chiang Mai, Chiang Rai, Si Saket, Bangkok, Surin, Tak, Buri Ram, Roi Et, Chon Buri and Khon Kaen.