Since I just went by here on a bus tonight and it won't rain in LA until November, here is a photo from the LA Times archive:
UCLA Digital Archive
The caption is:
View of a man crossing a flooded commercial street to get to his automobile. He is walking on a makeshift bridge made from wooden planks. A policeman wearing a uniform cap and a long raincoat stands next to the car. A sign below a window just above a headlight of the car appears to read "1557 Pico." Other signs on the buildings read "OK Auto Repair, Fliver Service," and "Laundry."
In the 1929 CD we find:
Kephart, Orlando I (Olive) auto repr 1537 W Pico
Nothing to see there today:
GSV
...although there seems to be a survivor a few buildings to the east.