I've been a UPS warehouse worker for almost 20 years. I like my job, but going to work in the summer is just awful.

• A UPS warehouse worker in a southeastern US state says the summer heat has made their job difficult.
• Workers are given a heat safety training but also watch each other for signs of danger.
• Customers who want their packages quickly don't understand what delivery workers go through.

This as-told-to essay is based on a conversation with a UPS employee based in the Southeastern US. They asked not to be named to protect their job, but their employment has been confirmed by Insider. The conversation has been edited for length and clarity.