Besides this site, I sometimes read
Wildfire Today. It's excellent on the topic of wildfires, mostly in the US, but with some coverage of Australia etc.
A couple of days ago, they had an
article about claims against the Durango & Silverton, based largely on the Durango Herald newspaper. There is a table listing 5 fires, but they weren't huge fires.
On the other hand, there
was a huge fire in June 2018 -- "The U.S. Forest Service has not released the cause of the most recent fire that started near the railroad [D&S], the 416 Fire that burned about 54,000 acres and ran up suppression costs totaling approximately $31.3 million as of six weeks after the fire started." That doesn't include other claims related to that fire. Ouch.