Unlivable conditions?

Okay I need help determining if this considered unlivable in Florida.I told the landlord 1 1/2 months ago the heat doesn't work{not yet unlivable I know}.He brings 3 space heaters ask can we wait til 1st of month{Sep} so he can collect others rent to have $$$.Sure.Last week the plumbing started backing up.With snakes and draino he managed to get the back bathroom working right.We can't even wash dishes in the kitchen.That's it.The shower back there is horriblely nasty and we won't use it.So we basically have a toilet.Now if it's freezing outside we run one space heater in the bedroom with the door closed.Which means should you need to go to the bathroom you have to walk through this freezing trailer to get there.There's not hot water in the sink to our working bathroom.{Which is against Florida law I know, It's the unlivable part I'm unsure of}.Front doors not weather tight.Let's air in.My wife has pneumonia BTW presumably from tracking thru the cold house back to the warm bedroom.I'm really wanting to terminate the lease because the landlord basicly refuses to fix anything beyond something he himself{A man with no kind of experience beyond running this trailer park, and whatever cheap stuff he can get} can do.So what if any conditions here make this place considered unlivable?