Yesterday we had rain.
There was standing water between 4 and 18 inches deep in various places on the freeways and on the on ramps and off ramps of “I-280.”
On I-280 last night there was at least one accident. Whether it was related to the standing water one can only guess.
Even if your car does not stall or get damaged due to being soaked by crossing a very bad puddle suddenly driving in a large puddle and causing some wave or geyser to arise is fairly disorienting to a normal person.