January 25, 2008 | 7:41
The Hotel Alexandria in the background identifies the location as Spring Street south of 6th Street. Note the early design of the streetlights and the streetcar tracks.
Here's a nice little trove of historic Los Angeles images that I stumbled across on EBay. The same vendor is selling some photos of firefighters, like this one:
There are also some shots of firefighters here and here.