Pattaya is well know for floods. Very often after extended periods of rain many busy areas in Pattaya become flooded. This is mainly due to the poor drainage system in Pattaya. It is quite common to see water coming out of drains!
The bottom end of Soi Khao Noi in East Pattaya (AKA Darkside) is one such area. This area becomes flooded very easily. On the 30th of April there was a short period of very heavy rain causing the flooding shown in the photograph below. The water was flowing very swiftly from the right to left. This swift flow brings with it a lot of debris this is left on the road once that water drains from the area. Fortunately the water drains quickly once the rain stops.
Also here is a short video of the same flood in the same area.