I just received this email alert from the City of Long Beach concerning the parade this sunday:
Waterfront Warrior parade Sunday 7/24 at 3PM. The parade route is Ohio Ave to New York Ave on West Beech Street. Traffic will be affected. Oceanview will be opened for through traffic during the event.
In other words, Parade = Traffic. I normally hate parades because they make no sense, but this one has meaning to it. Try to make it if you can!