 The average cost of electricity bills in the summer has increased 51% the past 10 years. If you live somewhere without air conditioning, experts recommend opening your windows at night and closing them by the afternoon. And having multiple fans blowing directly on you can make a big difference when it comes to regulating your body temperature. Eight minutes in front of the hour on This Morning. Once again, here's Nicole Murray. And now, the three big things you need to know. Number one.