A fierce storm left market stalls in ruins after blowing down tents and carts following the end of the heat wave in Thailand.

Footage shows heavy rain battering the Lam Luk Ka District of Bangkok on April 26.

The downpour caused stalls to collapse, with high winds blowing away the tents.

The storm came as temperatures soared past 42 degrees Celsius last week during a heat wave across the Asia Pacific region.

Maximiliano Herrera, a climatologist and weather historian, described the scorching heat as the 'worst April heatwave in Asian history'.

In Thai capital Bangkok, residents were warned not to go outside amid 42 degrees Celsius temperatures causing power outages due to surging demand from air con units and fans running.

The country's national weather service said the heat index - what the temperature feels like when combined with humidity - hit a record 54C (129F).

The warm weather is now giving way to extreme tropical storms.

The Thai Meteorological Department warned that southerly and southeasterly winds prevailing over upper Thailand would strengthen between April 23 and 26.

Outbreaks of summer storms, accompanied by thunderstorms, gusty winds, hail, and lightning strikes, were expected to affect the northeastern and eastern parts of the country first, before spreading to other regions.