Hot to very hot conditions are forecast in some parts of the upper country while thundershowers are likely in the lower North, the Northeast, the Central including Bangkok and its vicinity, and the East regions. People should beware of the severe weather, the department advised.
The weather forecast for the next 24 hours is as follows:
Northern region: Hot to very hot with thundershowers in 10 per cent of the areas; temperature lows of 21-25 degrees and highs of 37-41 degrees Celsius.
Northeastern region: Hot with thundershowers in 10 per cent of the areas, temperature lows of 23-26 degrees and highs of 36-38 degrees Celsius.
Central region: Hot to very hot with thundershowers in 10 per cent of the areas; temperature lows of 25-28 degrees, highs of 37-41 degrees Celsius.
Eastern region: Hot with thundershowers in 20 per cent of the areas; temperature lows of 24-28 degrees, highs of 33-38 degrees Celsius; waves a metre high and 1-2 metres high during thundershowers.
Southern region (east coast): Thundershowers in 40 per cent of the areas with heavy rains in some areas; temperature lows of 23-26 degrees, highs of 34-37 degrees Celsius; waves a metre high and two metres during thundershowers.
Southern region (west coast): Thundershowers in 40 per cent of the areas; temperature lows of 23-27 degrees, highs of 34-37 degrees Celsius; waves a metre high and two metres during thundershowers.
Bangkok and surrounding areas: Hot with thundershowers in 20 per cent of the areas; temperature lows of 26-27 degrees, highs of 36-38 degrees Celsius.