Temperatures throughout the country have surged over the past week, particularly in Lampang where it hit nearly 40C last week.
The Thai Meteorological Department (TMD) said the country will continue to experience high temperatures until the end of May.
In Lampang, 39.9C was reported in Thoen district last Wednesday and 38.2C in Muang district the following day.
The haze situation in the province has improved since Saturday after several areas were pounded by heavy downpours on Friday, resulting in a drop of the level of harmful airborne particulate matter.
Thunderstorms are forecast in Lampang and other northern provinces, particularly Mae Hong Son, Chiang Mai and Lamphun.
In Bangkok and its vicinity, temperatures will continue to surge this week with maximum temperatures of 34C-36C likely, and minimum temperatures of 24C-26C expected. Thunderstorms are also predicted in 10%-20% of the total area.
In Buri Ram, villagers flocked to Pra Sat Thong beach to cool down over the weekend.
The beach is part of the Thung Kraten reservoir, a local catchment for tap water production.
In the South, gusty winds and strong waves have forced boats to stay at shore along Khlong Praek Muang in Nakhon Sri Thammarat over the weekend.
Local fisherman Pithanee Yotsurang said poor weather conditions would result in a lack of income among fishermen as they were unable to operate their boats due to safety concerns.
