Er, not sure if you are in Chiangmai, but that is exactly what has been happening for at least 6 days now, but the scale of the devastation is staggering. Every street, Soi, lane, most businesses and homes have been severely affected. River mud, caked in places up to 10 cm + is piled everywhere and all I see, every day, including my village, thousands of Thai people (and foreigners to that extent), cleaning and clearing up. Each area has it own designated dumping area and the mounds of destroyed domestic goods and possessions is frightening.
This is no normal flooding. In my 20 years living in CM, there have been 4 major floods, which have been 'containable', by which I mean the cleaning and clearing up have all been achieved fairly swiftly, but this time, the 4th time the flooding was swiftly followed by another, more devastating event, reaching some 5.6-8 m high, including the most southern reaches of Saraphi and Lamphun, some 20 kms away. The worst disaster in 50-70 years.
The 'dump trucks' are working tirelessly to do exactly that which you so flippantly remark upon as, "Time now to ....
They're probably doing much more than armchair criticisms.