Here's one historical data map site, which claims to be pretty independent, although it uses "government data," seems like an oxymoron. https://usafacts.org/

If you look at the year trend for wildfires it is more. But more interesting is to look at it state by state. My state is more randomly up and down as expected. This means others are pushing up the average. There are a lot of other interesting data.

https://usafacts.org/data/topics/security-safety/fire-and-disaster/fires-and-firefighters/forest-fire-acres/?utm_source=bing&utm_medium=cpc&utm_campaign=ND-StatsData&msclkid=8a19e878f0931d11184c8c9c5cc29874

PS Note this is "acres burned," not "total fires," so it says something about the firefighting as well as the fires.