Dhaka, Aug. 29 -- With summer holidays in full swing, many travelers are heading to hot and sunny destinations - and taking their electronic devices along.

But phones, tablets and other gadgets are highly vulnerable to extreme heat. Southern European nations like Spain, Italy and Greece have been baking under soaring temperatures, while forecasters have issued repeated heat advisories across the United States, particularly in the Southeast.

Here's what device makers and experts say about keeping your electronics cool:

What heat does to a phone

Most devices work best within a specific temperature range. Apple says iPhones and iPads are designed for use between 32-95 degrees Fahrenheit (0-35 degrees Celsius).

In very hot conditions, Ap...