sitkahistory.com

8a9DP TIL that in 1974 a local in Alaska played an April fool's joke on April 1st of an entire city. He set about 100 car tires, smoke bombs and other flammable materials on fire in the crater of an inactive volcano to make it look like the volcano was about to erupt.
YpJDr TIL There was a man so dedicated to April Fools, he flew hundreds of tires into a dormant volcano in Alaska and set them on fire, fooling the locals and coast guard into thinking the volcano was active