(Salem, OR) -- Weather conditions will cause fire danger to be extreme today and Saturday in Oregon. Travis Medema, chief deputy state fire marshal, says strong winds and low humidity will cause explosive growth of a fire. Officials are urging Oregonians to be careful with anything that might start a fire and to be prepared to evacuate if necessary. Portland General Electric and Pacific Power have announced plans to turn off electricity in high risk areas. Residents can register at ORALERT.GOV to get emergency updates.