I looked it up. CA requires a 75 day non renewal period. The insurance companies are required to notify you 75 days in advance of your insurance renewal date that they are not renewing.
Even if they were notified of their cancellations to find a new policy with other insurers, they know what’s going on in the industry, the hazards, hike costs. I’ve read as much as 40%, pretty pricey. Some of the residents have lived there for fifty years.
I’m not talking about not being able to be insured. Even so it might be difficult to find insurers who see the problem coming, overly hot summer. I wonder if they knew about the empty resevoir and the hydrants being dry.