2010 Thailand–Malaysia floods

A series of flash floods hit different areas of Thailand and Malaysia in 2010. Separate but related floods began in Northeast and Central Thailand (per the six-region definition) in early October due to abnormally late monsoon moisture over the Bay of Bengal, overflowed the Chao Phraya where the rivers meet, and affected Bangkok, and in the South were triggered by a tropical depression about two weeks later, and were later aggravated by related La Niña monsoon rains.

Source: Wikipedia — 2010 Thailand–Malaysia floods (CC BY-SA 4.0)