Every year we have flash flooding in Thailand and the land can go under water for 1 day or 1 week. The rain fall is so hard this flooding can become a problem in only 6 hours.
The Rainfall can be so heavy, so you just need to stay home and shelter till it stops.
The photo below is rice fields in my home village in UdonThani.
You can see on the photo that the water has entered the fields.
The rice fields are over covered as the rice has just been planted in the fields.