Evacuation warnings lifted as containment on 'Fields Fire' grows in Merced CountyMerced County Sheriff Vern Warnke has downgraded the evacuation warnings for the Fields Fire burning in Merced County. Merced County Sheriff Vern Warnke has downgraded the evacuation warnings for the Fields Fire burning in Merced County. Merced County Sheriff Vern Warnke has downgraded the evacuation warnings for the Fields Fire burning in Merced County. Merced County Sheriff Vern Warnke has downgraded the evacuation warnings for the Fields Fire burning in Merced County. MERCED COUNTY, Calif. (KFSN) -- Merced County Sheriff Vern Warnke has downgraded the evacuation warnings for the Fields Fire burning in Merced County.