dates that i have seen

[Iris]

the "rain" was little cloudlets, spheres, of white gas.  it looked like steam but behaved like smoke. dense, white, wet but as people ran around the drafts they created by their movement caused the cloudlets to spread out.

I don't know if it could cause fireworks.  I saw the people running through it frantically.  they started coughing and rubbing their faces and falling.  no one that fell got back up. some people got away, but they were poisoned.

Perhaps you were dreaming of the California methane gas leak

http://time.com/4180692/california-metha...vironment/