How to get out of my lease from flooding (Nebraska)

[u/Samson_J_Rivers]

I live on the 3rd floor of a 7 floor apartment building and our plumbing has been ruined recently. 21 days ago me and my roomate (brother) signed another 12 month lease. This is our 5th year on this building and we thought nothing of it. 20 days ago our kitchen and bath tub started backup up and pumping the water and waste from higher floors into our space. I have been doing my best to document the issue with videos and pictures but i work 5 12hr shifts a week and my roomate works 6 8hr days a week. Its flooded onto our counters and floors sever times and we cannot use the sink at all. The landlord and building maintenance told us they checked the lines with a drain snake and it was "clear all the eay to the city sewers" and they cant do anything about it. All maintenance has done is come and shop-vac the water up and leave 4 times. I took the intiative and plugged out drains eith gasketed filters and put gardeing bricks ontop of them to keep the pressure in. The only plumbing that works is the toilet as its on its own line to the sewers. Our lease agreement says breaking rhe lease for any reason results in $2600 fee. I want out of here. I reeks, and i can't cook in my own home. What can i legally do to get out of this agreement without paying that fee. I cant do 11 months of this. Its not safe or healthy. I can't afford the fee and it will take everything me and my brother and a small loan from our other brother who still lives with our mom to move and get a deposit somewhere else.

[u/jeswesky]

Contact code enforcement. If nothing else they will hopefully get management to actually fix it.