It never rains in Hollywood, and then sometimes it does, and the place turns into the set for The Big Sleep – the 1946 noir film based on the gritty 1939 Raymond Chandler mystery novel – the smart but cynical seen-it-all detective, Philip Marlowe (Humphrey Bogart), gets involved with the general's equally cynical but stunningly beautiful daughter, Vivian Rutledge (Lauren Bacall) – and it rains a lot. (Any cinematographer will tell you that you get better definition and depth with wet streets, and shadows – dry streets look flat and crappy.)
Raymond Chandler set the story in Hollywood, and he places Philip Marlowe's seedy office is in what he calls the Cahuenga Building – it's actually the Security Pacific Bank building on the northeast corner of Cahuenga and Hollywood Boulevard – 1921, by John and Donald B. Parkinson. It's also where you'll find Eddie Valiant's seedy office in Who Framed Roger Rabbit – kind of the cartoon version of The Big Sleep. In any event, that corner in Hollywood is now Raymond Chandler Square. And it was raining there.
William Faulkner was one of the screenwriters of The Big Sleep – and at one point he and the other screenwriters got all confused. Was the chauffeur murdered or had he killed himself? They sent a cable to Chandler asking him which it was – and Chandler told them he didn't know either. It's like that out here.