“Temperature! Iphone has to cool down before you can use it.” Ever get this alert? I did once, after leaving my cellphone in the car for just five minutes while shopping. Good thing, because I hadn’t thought of this. Notebooks lying in the front passenger seat will get overheated too, which is even worse. Excessive heat can fry your hard drive and other parts! So, please keep your electronic devices out of direct sunlight and hot cars. If you have to leave one in a car for a little while, at least wrap it in a towel and put it under a seat or in the trunk.