That's silly. If you have a dedicated spot and good control over the bonfire, meaning it doesn't get out of hand at any point, I don't see how hot weather does anything. And if they justify canceling traditional bonfires because global warming, then they should cancel their giant corporations, factories, cars, and other shit that actually does the biggest damage and cancel all and any kind of fireworks too.
Our neighbors also were freaking out that we had the bonfire. We were prepared and watered the ground around it and had watering cans ready in case needed.
No doubt. For example, we have this special Caraway cheese that used to be something women of the house made as delicacy, sometimes recipes passed down for generations, now bought of the shelf. It's like, here's the perfect kit to put your celebration together. Where's the fun in all that? While businesses just cash in. Same with beer and other things.
RE: Solstice