We get that all the time from more than just Allstate here in California,
My inlaws have had their house insurance cancelled twice in the last 5 years without filing a claim.
Companies keep splitting whenever there is a big loss here usually earthquakes. Welcome to what we've been working with for a long time.
My parents had their insurance canceled when their German Shepard wouldn't allow a snooping company rep in the fenced backyard. The rep had no appointment, no one was home, he just showed up for a look around.
Insurance companies do not insure homes for earthquake in California. Earthquake insurance is provided by the California Earthquake Association -- state funded. Major concern in California are fires.