EE WAS USING AN AIRLANCE TO REMOVE BUILDUP FROM THE SWIRL CHAMBER. THE AREA WAS VERY HOT AND HUMID. APPROX 6 HRS INTO HIS SHIFT, HE BEGAN EXPERIENCING HEAT CRAMPS IN LEGS, ARMS AND BACK. HE WAS TAKEN TO THE DOCTOR AND REQUIRED AN IV TO REPLENISH HIS FLUIDS LOSS. HE RETURNED TO WORK ON 7/25/05 AFTER MISSING HIS SCHEDULED SHIFT ON 7/21/05