Yosemite fire managers have announced the 2010 Fire Season has begun. Fire season officially begins when seasonal firefighting equipment and personnel are in place, prepared and ready to respond. Firefighters have spent the last week conducting their annual readiness reviews that demonstrate skills and proficiency for fighting fire. In addition, daily weather patterns, temperatures, and moisture levels are closely monitored, which aids in determining if vegetation is within prescription for burning. https://www.nps.gov/yose/fireseason2010.htm