Why Did Hurricane Katrina Happen?

Hurricane katrina happened because air chemical was given out from factory's and bombs etc.... And it caused the earths layer to go so thin that it cracked thats how it started and all that I know and eventually led to a hurricane it made other reactions at first to show signs of a hurricane coming  but they were so small we didnt notice.

Oh my god plZ tell answer this question, I have to do this essay on hurricane katrina and one of the things I have to write is to: Describe what happened to the weather of Hurricane Katrina

Just a simple act of nature. Hurricanes form off the coast of africa and work their way towards america.

Ah ; lil wayne is ugly ! ;0
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why did hurricane katrina happen?

Because your mumma farted and I was so rank it went to the air and made a hurricane and your mum is call katrina hence the name and mosy people died from the smell