The Consumer Protection Center of North Rhine-Westphalia, Germany, stated that simple measures can help combat summer heat at home. Key among these is to ventilate the house well in the early morning and evening, rather than during the day. The center added that sunlight should be blocked from entering the home through windows during the day by shading the windows with external curtains and shutters. It is also recommended to turn off unnecessary heat sources, as every computer, television, or lightbulb raises the temperature.