Having lived in Wisconsin and TX, I can tell you WI isn’t setup for prolonged 100+ heat. Tx is. Someone else said it: No one plans for prolonged conditions 2+ standard deviations away from the expected.
Please see my previous comment. WI has had consecutive 100+ heat spells and the grid just laughed. If there were deaths, it was because negligent liberal big city Mayors didn't check on elderly residents who had bars on their windows due to crime.
I'm not here to bash TX, but pointing out that severe weather can happen anywhere and states and people need to be prepared. Even FL had frost in the past.