You might consider looking at USDA Forest Service websites for climate change and wildland fire risk. Here are a few of those links:
https://www.fs.usda.gov/science-technology/climate-change
https://www.fs.usda.gov/managing-land/fire
https://www.nifc.gov/fire-information/statistics
And at wildfirerisk.org you can find wild fire risk maps (that are downloadable for at no charge). Those maps are in layered GIS formats for further display or analysis. Here's one for Sacramento County (https://wildfirerisk.org/explore/0/06/06067/):
When you download the GIS layers you'll also have access to technical reports that describe the form of the data and how it was obtained.
There is a whole lot of data out there on Federal and State websites. And best of all: you don't have to give your email address or otherwise identify yourself to get complete reports and data (unlike firststreet.org). No salesperson will call or write you.
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Jim Baldwin
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