Christopher Begley, a 28-year veteran of UPS, died on Sunday after falling ill while making deliveries in the scorching heat of McKinney, Texas. The exact cause of death has yet to be determined, and authorities are investigating. UPS recently struck an agreement with the Teamsters Union to install air conditioning in its delivery trucks in response to the increasing heat waves. Begley's fellow workers mourned his death and praised his commitment to delivering packages safely and on time.