Up here, fire danger is taken very seriously. I was in the lawn care business many years ago. The county would send notice to property owners to clear away fire hazard. If the work was not done in 60 days, the county, through the fire marshal, would contract my company to do the work (I had long-grass/brush crews too), and attach the bill (along with a substantial fine) to the property owner's tax bill.
One notice by mail, second notice on the door, and then the county would contract the work.
Now see, I have no problem with that. It needs to be done and the homeowners are flakes. Fine, go ahead, do it and charge them. But the whining because the Fire Department warned them once but then didn’t remind them — that is stupid.