My theory is that chemtrails caused it. I've seen them in Phoenix and seen videos online of them there. Cloud seeding for causing clouds to rain is established science.
Cloud seeding is also thought to have caused the Great Depression's Dust Bowl.
???
So Chemtrails caused it in '33 as well?
My Mother told me she remembers the 1930's as very wet years,
with lots of rain storms. Even California was drenched in rain.
It was rare that a cloudless day was seen.
Temperatures does varies, there will be hot years, wet years
every several generations.
What happened in Phoenix, a desert city. Was most likely man
made.
I noticed here in Houston, after the sky is chem trailed on a clear
blue sky, it turns cloudy.