(Portland, OR) -- Extreme heat is forecast from Vancouver to Salem today, and power utilities are asking for help conserving electricity. Summer has the highest amount of power usage during the year. Wait until early morning or late evening to do laundry or run the dishwasher. Keep air conditioning at 78 degrees or higher. Turn off computers and other appliances you're not using. Opens windows overnight to cool your house. And fans will keep air moving to make it feel cooler.