Showers and breezy conditions were expected to continue across the Riverside Fire area Thursday with cool temperatures and high humidity.  Gusty winds were also expected, especially at higher elevations.  The fire on the Mt. Hood National Forest in Clackamas County is listed at 34% containment, and is 138,029 acres in size.  The fire continues to smolder in areas where heavy fuels including logs, stumps, and deep layers of needles are sheltered from rain.  Firefighters are mopping up and patrolling 90 miles of completed fireline.  Fire crews and heavy equipment continue to expand and strengthen firelines where they can do so safely and effectively.