I rode 17 miles up one of the local bike paths here to the Los Angeles forests, testing myself against the mountain, scouting for a good S24O spot...but I had to turn back because of the intense heat wave we're experiencing. I didn't know it then but I think I may have been getting a heat stroke because I soon had a headache that just would not get away, felt hot no matter what I tried, and thirsty despite drinking a ton of water. I will not make the mistake of pushing myself to my personal limits again, but I just want to ask you guys, how do you avoid overheating on long rides? Product and brand recommendations are appreciated, as well.

-Sun block (what SPF, what brand, though?)
-Some sort of hat to shade my face. (what kind of hat would be good for this? I was thinking of buying a sombrero or one of those hats I always see in movies set in Vietnamese rice paddies)
-Chap-stick (with SPF)
-Bandana to wet and put on myself.
-Any special clothes??


Also, my water ended up being pretty warm but it's all I had. Is drinking hot water bad on such hot days?

Thanks for any advice.