Letting it burn down would be best, it’s going to be torn down and destroyed anyway if it was that hard to put out.
Edit: not sure I empathize with those downvoting me, I dont see a world where a private business’s asset, which is covered by insurance, is worth the health and safety of an entire community for any length of time.
Sorry Helen, we can’t run your dialasys machine because it would inconvenience Mr. Landowner. Sorry Martha, I know you’ve just been in a lab accident and your skin is melting off, but we need the emergency shower water for Mr. Businessman so that he thinks we’re doing work instead of caring about our community.