Sudden Squall

Today in the morning, there were a sudden squall.
at the time, there was a weather broadcasting on tv. fortunately the weather caster said that in my region is sunny.

to my surprise, just about 10mn the water in the drain become full and over flown every where.
it was a sudden happenning.

as what was told by weather caster, it became sunny in about 40mn.
and the water over flown also run out incredibly.