Its terrible out my back door. All my plants have died. I loved that cactus with its pink and red blooms. Geeze .... I'm going to have to start fresh with my plants.
You might bring the cactus back with some electrolytes. Provided the ground did not freeze. I have cactus all around my house our ground never freezes we do get snow and frosty cold nights. The cactus seem to survive. You can get electrolytes the smart water has them and Trader Joe's sells electrolyte water.