The 2013 Fire Season in Yosemite National Park will begin on Monday, May 20, 2013. Fire season officially begins when seasonal firefighting equipment and personnel are in place, prepared and ready to respond. Additionally, grasses and other vegetation at the lower elevations have begun to dry out. This year, vegetation is drying out faster than average due to the low snowpack the park received over the last two winter seasons, making for fire danger above average for this time of year. https://www.nps.gov/yose/learn/news/fireseason513.htm