Ee was welding on walkway above crusher on Fri, 6-11-04. At 1:00 pm ee alleges being hot, weak & not feeling well. Ee left work at 2:30 pm after not feeling any better. Ee not scheduled for Sat. or Sun. Ee reported to work on Mon 6-14-04. After 3 hours, ee complained of being weak & stomach pains. Ee left work to see his dr. Diagnosed as heat exhaustion & dehydration.