Soldiers use this fast, cheap solution to quickly cool down in the scorching heat. And you can, too.

It almost seems too simple to be true, but research shows submerging your forearms and biceps in ice cold water can prevent overheating. It's a technique the U.S. Army has embraced at bases across the country. 

"It's low-tech, it's inexpensive, it's easy to implement," said Lt. Col. Dave DeGroot, who runs the Army Heat Center at Fort Moore. "It's a bucket of water." 

When immersed for five minutes, an ice bath can lower core body temperature by as much as 1 degree Fahrenheit. Given that normal body temperature ranges between about 97 and 100 degrees Fahrenheit, one degree of internal cooling makes a significant difference.