World/Area random events

[cromcrom]

Some world/area random events could be pretty neat.
We would want players to hace interaction with the event, to gain some stuff/quest from it.
Some examples:
Forest fire: burns trees(obvioulsy). Spreads to nearby trees/plants. Kills animals, detroys plants. Can be extinguished using water (from a nearby pond, or rain puddle, or whatever). Every extinguished tree/plant could give a slight chance to spawn a thankfull tree spirit (that would then give some plants, come as a follower, teach stuff, whatever...). Of course, going near several burning trees would be harmfull (heat/fire relevant), the more trees, the more harmfull, unless protected (spell, clothes, whatever...).
Shrooms disease: all shrooms disappear from the world, for some times, untill the player Recovers the ONE shroom. Same for many kind of stuffs.
Vampire Lord attacks living stuff, and turn them into "gouls".
Zombie uprising A cemetary spawns zombies, until some enchantment is dispelled, by whatever means (or a max amount of zombies is reached, or whatever).
EpidemicsNPCs get sick, you won't be able to talk to them until they are healed (receive proper spell, or plants, or whatever) or for some times. Could be a great opportunity for the player to gain money.
Some random boss spawn: "Bigfoot" has been seen near whatever, it probably won't stay long there. This kind of encounter should definitely be scaled...