I receive my inhalers mail-order several days transit from Canada x 3 years and never had an issue with discharged inhalers. I know what time the postman delivers. I’m sure rx delivered from your local pharm will be just as fine. In fact, they are encouraging mail order right now so you don’t go to the pharmacy.
I live in AZ. It gets up to 115 degrees here in summer. Down the road, it gets up to 125 in the summer.
That stuff can not be out in the hot air.