For nearly a decade, Viviana Gonzalez has spent her summers delivering packages for United Parcel Service under sweltering sun in Palmdale, California – in a truck without air conditioning.
A typical work day means at least 10 hours in and out of one of UPS' brown delivery vehicles, where temperatures in the back, Gonzalez said, at times surpass 150 degrees. Her only relief is a fan that blows hot air into her face.
