Economy Heat takes down more UPS workers during hottest summer ever - NBC News July was officially the hottest month on record, and in the scorching sun, UPS workers have convulsed, fainted and landed in the emergency room with heat-induced kidney failure, interviews and medical records show. Sixteen employees of the delivery company told NBC News they have suffered heat illnesses so far this summer, highlighting the continued hazards UPS workers face as workloads ramp up in record temperatures. Last month, an NBC News investigation revealed that more than 100 UPS employees were hospitalized for serious heat-related injuries between 2015 and 2018, more than any other company in the country except the U.S. Postal Service. UPS, which has almost 400,000 employees, 74,000 of them delivery drivers, does not air condition most of its warehouses or its brown delivery trucks, whose cargo areas can reach 150 degrees, drivers said.