The combination of heat, low humidity, and gusty winds is expected to cause rapid spread of wildfires across the area. A Red Flag warning has been issued for most of the viewing area, with relative humidity expected to drop as low as 4%. A strong cold front is expected Friday, bringing advisory-level winds and significant heat. The National Weather Service has issued a Wind Advisory from 1 a.m. to 7 p.m., with widespread winds of 30-40 mph with gusts up to 55 mph expected.