So how much rain did they get? The story mentions 0.36 inches in Los Angeles and plays that up as a record in LA for July. That may be the case for LA, but 0.36 is not a heavy rain. I presume more came down in the mountains?
In a 48-hour period ending at 7 p.m. Sunday, automated gauges collected 4.10 inches of rain in Ramona, 2.69 inches on Volcan Mountain, 2.39 inches in Kearny Mesa, 2.33 inches at Montgomery Field and 2.09 inches on Palomar Mountain.
http://fox5sandiego.com/2015/07/20/more-rain-possible-after-record-setting-weekend/