Here's a photo of a sign being put up in front of City Hall identifying the building as a shelter site. Note the loudspeakers above it. These were serious times and everyone needed to be at the ready just in case.
Some additional World War II information:
Victory Park was dedicated as a living memorial to those who fell in World War II. Note that the rose garden is in the shape of a "V." Next time you're in the neighborhood, stop by and take a look around the memorial area, including the dedication plaque at the base of the flag pole. It's really quite nice. There's also a memorial to U.S. Army Staff Sgt. Joe Hayashi, the only Pasadena resident to be awarded the the Medal of Honor (posthumously by President Bill Clinton) for making the ultimate sacrifice during World War II. This photo was taken on Memorial Day so the flag was at half-staff.
The Vista del Arroyo Hotel was taken over by the federal government and converted to a U.S. military hospital during World War II. Today it is still owned by the federal government and serves as one of the locations for the U.S. Ninth Circuit Court of Appeals.
Two of Pasadena's five sister cities -- Ludwigshafen, Germany, and Mishima, Japan -- were "adopted" post-war so Pasadena could help the cities' civilians get their lives and their communities back to normal.
The bombing of Pearl Harbor on Dec. 7, 1941, put the entire west coast of the U.S. on high alert, forcing the cancellation of the Rose Parade on Jan. 1, 1942, as a precaution. The Rose Bowl Game was moved to Duke University (score: Oregon 20, Duke 6). Anyone who has one of these tickets may be sitting on a gold mine because they were useless and had to be reprinted!
The astronomy program managed by Caltech came to a halt during part of the war because most of the engineers and scientists involved in the program were reassigned to war-related projects.
What will the next Mystery History photo be? You'll have to wait until next Tuesday to find out!