@neil Having lived for the past ~30 years in areas of the US that have significant fire risk most summers (now in Oxfordshire), let me say that the disposable BBQs in the UK are -INSANE- and that no one in their right mind should use them at any time. So with lots of caveats around the differences in climate, environment, behavior, equipment, and all the other differences, the best summary statistics on the actual causes of wildfires seem to be published by Cal Fire (California Department of Forestry and Fire Protection). The California statistics for 2025 show 12 fires totaling 277 acres caused by BBQs and 41 fires totaling 7 acres for all Smoking causes. (out of a total of 3,693 fires and 76,977 acres). All the data from CalFire is in the Red Book links at the bottom of the page here: https://www.fire.ca.gov/our-impact/statistics