This is most likely to occur when the temperature is over 90 F or more. First aid for heat cramps and exhaustion can make the person much more comfortable, and able to return to normal activities more quickly. First aid for heat stoke can save a persons life. By following a few simple steps you can help prevent over heating of the body. First, wear light breathable clothing and a hat to keep from getting overexposure from the sun.
Sunglasses are also helpful when out in the sun all day.
Second, drink water, and lots of it. While working in the heat you should drink at least a glass of water every 15 to 20 minutes. This works out to a gallon or so of water a day. Your body can loose as much as 3 gallons of water per day. Third, take breaks when you feel exhausted or overheated.