People should beware of the severe conditions, it advised.

Here’s the weather forecast for the next 24 hours:

Northern region: Partly cloudy with thundershowers in 20 per cent of the area; temperature lows of 24-28 degrees and highs of 37-39 degrees Celsius.

Northeastern region: Mostly cloudy with thundershowers in 60 per cent of the area and isolated heavy rains; temperature lows of 24-26 degrees and highs of 33-37 degrees Celsius.

Central region: Mostly cloudy with thundershowers in 40 per cent of the area; temperature lows of 24-27 degrees, highs of 35-37 degrees Celsius.

Eastern region: Mostly cloudy with thundershowers in 60 per cent of the area and isolated heavy rains; temperature lows of 24-27 degrees, highs of 33-37 degrees Celsius; waves a metre high and 1-2 metres during thundershowers.

Southern region (east coast): Mostly cloudy with thundershowers in 40 per cent of the area; temperature lows of 23-27 degrees, highs of 33-37 degrees Celsius; waves a metre high and 1-2 metres during thundershowers.

Southern region (west coast): Mostly cloudy with thundershowers in 40 per cent of the area; temperature lows of 23-26 degrees, highs of 32-35 degree Celsius; waves 1-2 metres high and over 2 metres during thundershowers.

Bangkok and surrounding areas: Mostly cloudy with thundershowers in 40 per cent of the area; temperature lows of 24-28 degrees, highs of 33-36 degrees Celsius.