Update 8:30 p.m. - Fire is 70% contained and has reached 110 acres, ECM reporter Nadin Abbott reports.

Update 8:00 p.m.  -- The fire has swelled to 60 acres, ECM news partner 10 News reports. One lane of 52 east is now open but the Santos ramp remains closed.  There are no threats to structures at this time.

June 16, 2013 (San Diego's East County) -- A fast-burning brush fire has consumed 20 acres and has now crossed into Mission Trails Regional Park, according to the CHP website at 5:25 p.m.  State Route 52 eastbound is also being shut down near Santo Road.