'Heavy People' may collapse more in heat?

[is it just me, or is this article already stating the obvious? WTF?]

Obese people face a higher risk of passing out — or worse — during heat waves, some health experts say.

Layers of fat make it extra difficult for a body to dissipate heat, or to move to a cool location. Add in diabetic dehydration and other conditions common in the obese, and it's a recipe for trouble.

"ER physicians will tell you that they (obese people) are the ones collapsing," said Thomas Adams, a Michigan State University physiologist.

Federal health officials list obesity as a risk factor for heat-related illness, but health warnings generally focus on the dangers to children, the elderly and the socially isolated. Those are the groups considered most in danger of fatal heat stroke, health officials said.

The body cools itself by circulating blood to dissipate heat through the skin. A heavy person's heart must pump harder to circulate blood on a hot day. When a person is standing up, the most difficult place to circulate blood to is the brain. So inadequate circulation can cause someone to be lightheaded and to faint, Adams explained.

People also cool off by sweating. An obese person who cannot dissipate heat through circulation will sweat more, meaning they lose water and body salts to become more quickly dehydrated, he added. Article here.