Wed, 07/26/2023 - 11:30 Tech Insider Amazon, FedEx, UPS, and USPS make millions of deliveries every day. Heat waves make the jobs behind those deliveries more dangerous.Chelsea Jia Feng/Insider Tags Transportation, Chelsea Jia Feng, Insider Illustration, BITranspo, Logistics, UPS, FedEx, amazon, USPS, frontline worker, Heat, Climate Change Source Scorching temperatures are making delivery a dangerous job — and it's only gett…