I really messed up my schedule today. I went running the hottest part of the day (mid-day). I drank extra water before I left home, and I took a good drink at the trail head before started south from 100th South. Because of the heat (temperature was about 95 (F), I stopped when ever I passed a bench and rested for a minute or so. I also walked more than I normally would. I had mowed my lawns earlier in the day, and my body was probably tired from doing that. During hot weather like today, I run to survive. Spring and Fall are times to improve performance.
The first sign of heat exhaustion that I usually get is a headache. I didn't have that symptom today. Another sign of heat exhaustion that can lead to heat stroke is a lack of sweating. Sweating is the way our bodies regulate temperature, and if we stop sweating our internal temperature starts to climb. I wasn't aware I was sweating less during my run, but at the end of the run I got a good drink of water, and sweat started pouring down my face.
Because of the shortness of my run, I didn't carry water, but I should carry water when ever the temperature goes above 90. I need about 1 cup of water per mile, so I should have carried two bottles of water (1 cup each) in my Fuel Belt. Hopefully, I'll get used to the heat (to a degree at least), but in the meantime it would be good for me to run earlier in the morning.