Refinery fires started globally during 2019
https://www.cnn.com/2019/06/21/us/philadelphia-refinery-fire/index.html
https://english.alarabiya.net/News/gulf/2021/03/19/Riyadh-oil-refinery-targeted-by-drones-fire-brought-under-control-Saudi-official
https://abc17news.com/news/ap-national-news/2021/11/13/scores-evacuated-in-fire-at-indonesias-largest-oil-refinery/
https://www.reuters.com/world/india/indian-oil-says-fire-unit-kills-3-injures-44-2021-12-21/
https://www.latimes.com/california/story/2020-02-25/large-fire-reported-at-carson-refinery
https://abcnews.go.com/US/wireStory/fire-erupts-exxonmobil-refinery-louisiana-injuries-68933088
https://www.arnolditkin.com/news/2020/fire-at-delaware-city-refinery-critically-injure/
https://wyo4news.com/news/update-explosion-at-the-silver-eagle-refinery/
https://www.hydrocarbonprocessing.com/news/2021/11/fire-breaks-out-at-toledo-refinery
It has been systematic, and global.
And they ALL ONLY start very early in the morning, since 2019.