Summer heat is making pump life complicated

I've been using an insulin pump and I'm realizing that hot weather creates a whole different set of challenges.

Sweating, humidity, outdoor activities, keeping supplies at the right temperature, and even power cuts can make managing diabetes technology more stressful.

For people who use pumps in hot climates, what problems have you faced? Do you have any tricks for keeping the pump secure, protecting supplies, or handling situations like long power interruptions?

I'm especially interested in practical day-to-day experiences rather than just the official instructions.