Fire season will begin for The Dalles Unit of the Oregon Department of Forestry as of Saturday, the earliest start in more than forty years.  District officials say limited precipitation across the region this spring has affected down woody fuel moisture content as well as the condition of live vegetation fuels and their susceptibility to fire ignition and spread, leaving unseasonably dry conditions and at an increased risk of fire spread.  In addition to the on-set of Fire Season in The Dalles Unit, MH-4 west of Highway 35 in Hood River County and MH-1 east of Highway 35 in Hood River and Wasco counties will move into Industrial Fire Precaution Level 1, which includes restrictions on the use of fire or power-driven machinery in any forest operation unless in compliance with all fire prevention requirements.  Also, ODF says Hood River and Wasco counties will be implementing county-wide burn bans on June 1 to reduce the risk of wildfire from escaped debris burns.