70K Homes In Irvine Under Mandatory Evacuation. RT @OCFA_PIO:More than 1,800 firefighters for both #fires in OC.#SilveradoFire:12,600 acres5% contained No structures lost#BlueRidgeFire:15,200 acres 0% contained 10 homes damaged Homes under mandatory evac:70,000 in #Irvine8,000 Lake Forest2,500 in Yorba Linda —…