The National Weather Service in San Diego has issued a Red Flag Warning, which is in effect from tonight at 9:00 p. m. to Friday at 6:00 p. m. The Red Flag Warning has been issued due to strong gusty winds, low humidity, and is in effect for the inland valleys and mountains of San Diego County. * Any fires that develop will spread rapidly with extreme fire behavior, threatening life and property. * Be prepared to evacuate if needed. * Be sure your cell phone is registered with AlertSanDiego , the countyE28099s regional notification system to receive the warnings directly to your mobile phone. People may also register their VoIP phone numbers or emails as well. The strongest winds are expected tonight into tomorrow morning with gusts up to 65 mph in the windier locations. The lowest daytime humidity will be 5 to 10 percent. More forecast information and updates are available from the National Weather Service. For information and updates on potential power outages, please visit www. sdge. com/Ready