Riyadh – November 29, 2011
The soil of Riyadh will absorb water up to a point, then the flooding begins.
The ring road exit is high and dry. On one side of it, the high side, small rivers drain downward from the side streets, but when the water hits the newer construction of the exit road, it can go no further. Cars hydroplane through the standing waters, while floodwater is pumped into tankers and dumped into drains on the other side.
Meanwhile, on the other side, the low side, water boils up out of the drains.