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Largest Farm to Grow Crops Under Solar Panels Proves To Be A Bumper Crop For Agrivoltaic Land Use
(site.extension.uga.edu)
This is a most excellent place for technology news and articles.
It's probably a fair point - any fire there is now going to be burning a while load of artificial materials instead (as well as) plants. I could see that being an issue if there was a big fire. (Much larger cost to the farmer too!)
Silicon doesn't burn, and even if it did, it's literally just purified sand. The other materials in silicon solar cells are either only found in trace amounts, or also found naturally in soil, i.e. aluminum.