As the heat emergency continues for a second day, the temperature is forecast to hit a high in the triple digits and the humidity is also likely to peak. The combination of both those factors is known as the heat index. And it packs a wallop on the human body.
Health and science reporter Allan Coukell looks at what happens and what you can do to try and beat the heat.
This program aired on August 2, 2006. The audio for this program is not available.