My province dealt with a heat dome in the Summer of '21. Weeks of temperatures like we'd never seen. It was so hot that an entire town caught fire and burnt to the ground. Over 600 people died from the heat.
I ended up in the ER multiple times with heat exhaustion [one step below heat stroke] during that heat dome.
Heat exhaustion was Hell. An unceasing migraine for weeks. Felt overheated no matter what--drank loads of water, didn't help. Hugged an ice pack, didn't help. In the air-conditioned hospital, didn't help. Brain fog and fatigue, both physical and mental.