EMP WAS LOADING AND UNLOADING TANK CARS IN EXTREME HOT AND HUMID WEATHER CONDITIONS. HE BECAME NAUSEATED AND SICK. HE STARTED FEELING DIZZY AND FELLOW WORKERS APPLIED COLD COMPRESSES AND CALLED FOR AN AMBULANCE FOR FURTHER MEDICAL CARE. HE WAS TREATED AT EMERGENCY ROOM AND TOLD TO STAY HOME NEXT DAY AND TO DRINK LOTS OF FLUIDS.