Flood risk management plans (FRMP) should’ve already been in place. Just quickly implement the plans when flooding seems imminent, instead of running around in circles. Root of the bigger problem is downriver - protecting the sinking city of Bangkok, originally built on river delta swampland.... Difficult - the West has sinking cities, too, like London and Amsterdam. Long term, Bkk faces more flooding and a rising sea level from global climate change. Groundwater extraction and the increasing weight of Bangkok’s infrastructure causes the sinking, some places about 2 cm. a year; the sea level rise is about 0.4 cm. a year. Short of the horrendously expensive relocation of the capital city, combat groundwater extraction and global climate change.