According to the woman on Radio 5 just now, "on days like this [ie snowy ones], your computer screen is red hot". In case you're wondering why this might be, she went on to explain that it's because you're looking at so many different online weather reports, traffic news, flight info etc.
So today I have learned that looking at lots of different websites in a short space of time can cause your monitor to overheat. Well I nevah!