Other autoimmune forms include dermatitis herpetiformis, which causes itchy skin lesions, and gluten ataxia, which affects brain tissue, resulting in unsteady gait and lack of motor control.

WSJ: New Guide to Who Really Shouldn't Eat Gluten

Forecasters say people should limit outdoor activity during the hottest portions of the day, wear lightweight clothing, drink plenty of water and be watchful for signs of heat exhaustion, which include heavy sweating, pale and clammy skin, weak pulse, fainting and vomiting.

CNN: Heat advisories issued to states dwindles to 15

Early results are promising, and the second compound may lack Sutent's side effects, which include fatigue, an incredibly sensitive tongue and yellowed skin.

FORBES