I am renting a home that has had no air conditioning for the last 3 months with three small children, a roach infestation, water dripping into breakers, and unsafe drinking water, what can I do. The landlord is very aware of the situations.

Does your lease say the home comes with AC? If not them not much can be done. Tell me more about "water dripping into breakers" do you mean the electric panel is getting wet? http://ago.mo.gov/publications/landlordtenant.pdf