KENMORE 40 GAL. HOT WATER {GAS HEATER TANK) MAX CAP. 33 GAL?

THE TANK HAS RUSTED BY THE ON OFF SWITCH (LOWER PART) AND IT WAS SPEWING SCALDING HOT WATER OUT OF THE FAUCET AND DRAIN PIPE. THEIR IS A LOT OF MILDEW OR DAMPNESS IN THE COMPLETE HOUSE. EXAMPLE : BATHROOM FLOORS SOFT FEELING, KITCHENFLOOR HAS BEEN REPLACED ,YOU CAN TASTE SOMETHING WHEN YOU COME THE HOUSE, AFTER THE HOUSE HAS BEEN CLOSED UP FOR A COUPLE OF DAYS..