I am told that during the rainy season, the streets run like rivers for one to two hours most afternoons.

This year, the rain was not as regular, but when it did rain it made up for it in ferocity and duration.  The development in which I have my house is directly across the street from an arroyo (stream bed), which has been running quite high this year.  We had a scare of some flood potential on the night of September 16.  Here's are some videos of the street flooding in and near our development: