I spent last week at Boy Scout Camp in MD. No A/C plus we slept in tents and walked everywhere.
A/C is a recent phenomenon and I daresay we can learn to live without it for a few days.
I’ve been through several weeklong power outages, both summer and Michigan Winter. It’s doable.
You may be able to but many sick and/or elderly people can not. Some would be gone within 12 hours.