The heat that is unbearable to our bodies is potentially destructive to our electronics. 
Just as film is vulnerable to heat, so are the components in your cameras, MP3 players and computers.
A good rule of thumb is that when you retire to the air conditioning, take your electronics with you.
At special risk are your expensive batteries. They can lose their power and, in the extreme, can leak or explode inside of your expensive devices. Make sure you allow your rechargeable batteries time to cool down before you charge them.
The CCDs and CMOSs inside of your cameras and video equipment can't handle the heat.
A situation may arise if you do have a cool camera and the heat and humidity are high outside is that if you see something that needs photographed, and you rush outside to get the picture, be prepared for lens fog.
Some lens cleaners add a touch of fog-proofing, but don't count on it.
Protect your investments as you protect your health.
© tim www.timjohnsonphoto.com