Quote Originally Posted by Muirenn View Post
What is your helmet like? Is it lightweight and vented? Just one or the other? Or neither?

Is your hair damp with sweat at the end of a ride? Can you feel any air getting to your scalp when you ride?
This is the helmet I ride on the road - it is a UVEX mtb helmet. The color is different but I think it is just last year's version - it doesn't seem overly heavy and has bug netting on the front vents. I have a more robust mtb helmet for trail riding.

I can't seem to remember feeling any air getting to my scalp, but my hair wasn't drenching wet when I got home last night - though generally is at the back of my neck. I will pay more attention to this,

Quote Originally Posted by Trek-chick View Post
When I would commute on hot (90* + days) I would wet my hair and jersey down before I left. I usually do not like to commute on very hot days though. My commute is 16 miles. Always drink a lot of water even before you ride, that seemed to help me too.

I would drink water constantly throughout my workday, for my long commute home.
Good idea about doing that before you leave the office. So far I've not commuted in very hot temps as the one day I commute is my short, 4 hour day (I work 4 nine hour days and 1 four), which means I am typically home between 12:30-1:00. My ride home is close to the distance you ride, and features more climbing than the flat/downhill, and shorter, route to work.

The almost-nausea started almost immediately after getting on the bike, it may have been hotter than I realized. With the low humidity it just didn't FEEL that hot.