Is This the New Pattern of Rain Cycles Not 100 Years

The pictures are of the runoff water draining from the streets and fields and into the large ravine running through east Peru. All you had to do was stand above and listen to the torrents of water as they raced through below to realize the ferocity of the drainage.  Normally this is a trickle of a stream or at most a couple of feet wide.
I have always lived within a few blocks of this area and as a child walked through it to Washington Park, the stream was just a trickle always but due to expansion of the city and having buildings instead of pastures and fields, it has increased the water flow after a heavy rain.  Looking at this and thinking about how our drainage could not handle the large amount of rain even though statistics are giving Peru 4.5 inches of rain compared to more to areas about Peru.
Looking forward to the meeting on Monday and the explanation of why areas that were supposedly clear after the last devastating rain runoff 5 years ago had a recurring problem.