It was 111 today in SOCAL in the high desert. Way too hot to ride for me. I remember when I first moved here. Rode at 100 then 105, then 110. One day it was 115, I said no big deal. Uh-huh, after 15 minutes, I had already sucked all the water out of my hydration pack like 4 liters. I started getting dizzy, made uturn hauled it to the house. I realized I was losing the water faster than I could drink it!! Four liters in 15 minutes! I checked the road temp and it was over 160. With that temp, the bike blowing hot air on me, and with the humidity at 5%, I wasn't sweating any that I could feel anyway. Over here I rarely sweat like the rolling beading sweat like in the south with all the humidity. I learned real quick that even though I wasn't sweating, I was still perspiring at a super-fast rate. Now I carry my water like a baby and his bottle sucking on that straw every 2 minutes or so even if I'm not thirsty. If I wait until I'm thirsty here, I'll be dehydrated way too much and will get sick!