The value of land, and the things that are on it, are tied together tightly. For much of California the price homes has much of the value in the home.

Even worse the assessed value of property, for tax reasons and insurance reasons can be abnormally low in CA (vs value). Many people in the fires have learned too late that they were underinsured and are no where close to being able to rebuild the same house on their property with their insurance payouts.