![Pacific Power WA on Twitter: "On chilly nights, heat can be lost through your windows. Close curtains and blinds at night to help keep heat in your home and save energy. For Pacific Power WA on Twitter: "On chilly nights, heat can be lost through your windows. Close curtains and blinds at night to help keep heat in your home and save energy. For](https://pbs.twimg.com/media/FMKZEQXXwAAcNDf.jpg:large)
Pacific Power WA on Twitter: "On chilly nights, heat can be lost through your windows. Close curtains and blinds at night to help keep heat in your home and save energy. For
Mississippi Power - Make sure to keep your blinds shut or curtains closed during the day to keep heat from the sun out and reduce the effort on your home's AC unit.
![Windows closed? Windows open? What's the best way to keep your home cool in the heatwave? | Extreme weather | The Guardian Windows closed? Windows open? What's the best way to keep your home cool in the heatwave? | Extreme weather | The Guardian](https://i.guim.co.uk/img/media/9981e30b132e818c0ebb80adad21182120842e18/0_0_5541_3325/master/5541.jpg?width=700&quality=85&auto=format&fit=max&s=0de3809085066ab6e47e207b6e73f957)