Monsoon flash floods wreaked havoc in a hospital and homes in Thailand.

The deluge was caused by a heavy, hour-long downpour that battered Loei province on June 15, filling the medical centre with ankle-deep water up to 30 centimetres deep.

Locals evacuated their belongings to prevent property damage as they waited for the flood to recede. Officials provided temporary shelters for those who have been displaced. There were no casualties from the floods.

Thailand and other countries in Southeast Asia such as Malaysia, Indonesia and the Philippines are in the middle of their tropical monsoon rainy season, which lasts until October or November.

Soaring temperatures reaching 35 degrees Celsius are often followed by powerful tropical storms with thunder, lightning, rain and flash floods.

Many of the under-developed nations struggle to cope with the heavy rain due to chronic under-investment infrastructure and high levels of corruption funnelling away public funds.

Thailand was ranked 110 out of 180 on Transparency International's 2021 Corruption Perception Index. Denmark, Finland and New Zealand were ranked joint first place while South Sudan was bottom.