Mojave Spaceport temporarily evacuated due to a small scrap metal fire.
The official statement can be read here. As noted by Doug Messier,
There’s a question of why scrap material (or any other flammable material) was anywhere near a tank full of nitrous oxide. In consulting with one expert who uses nitrous oxide, I was told that a blast could have possibly damaged everything within 1,000 feet. That’s basically two complete football fields with end zones plus another 93 yards. There are a lot of irreplaceable people and technologies within 1,000 feet of where that fire took place.
Then again, a fire can occur almost anywhere, and it is often impossible to keep it away from flammable materials.