Why, if our body temperatures are 98.6 degress is an optimal climate closer to 70 degrees?

Question

This of course is pertaining to humans. It seems that it's really rather easy to get heat stroke in 98.6 degree air temperatures. Also strangely, 98.6 degree water for an extended period would seem optimal.

Answer 1

thats our core temerature, our outer temp. needs to be cooler or we will over-heat

Answer 2

Seeing as we're warm blooded, it wouldn't make sense that we would need our climate to be around the same temperature as our normal body heat.

Our bodies are always releasing heat in order to maintain homeostasis [remain at 98.6 degrees F], thus, a cooler climate is usually preferred so that less sweat is necessary. If we remain in hot weather for an extended period of time, our body needs more fluids to replenish that which it loses through  [sweating]. However, most people do not feel thirsty until they are already dehydrated, even to the point where they have stopped sweating. When you stop sweating, your body has no means by which to cool itself [other than by dilating the blood vessels, which is not nearly as effective]--when your internal body temp. reaches around 106 degrees--that's usually when heat stroke occurs.