As a [Los Angeles] California native and multiple homeowner, I can say that earthquake insurance is prohibitively priced. To the point that it is very rare indeed to find any structure that has it.
BunnySlip.
While that may be entirely true in California, I have had an earthquake rider in Missouri on two properties (one within 120 mi of New Madrid) and in Arizona and the rider is not prohibitive.
Building in flood prone areas is just asking for trouble. The dangers of flooding mostly involve people living in dangerous places.
Interesting. I had it in Washington State, and the price was minimal.
About ten years ago shen I lived in Sonoma County (CA), home to the Rodgers Creek Fault, earthquake insurance was a bargain, probably because either 1) it was subsidized, 2) it wouldn't have really paid off or 3) both of the above.
Good info. I heard only 10 - 20% in CA have earthquake insurance. But if there was a major quake, it would destroy vehicles, household goods, property, etc. The US has not seen a major quake in quite some time.