CG lightning can occur with both positive and negative polarity. The polarity is that of the charge in the region that originated the lightning leaders. An average bolt of negative lightning carries an electric current of 30,000 amperes (30 kA), and transfers 15 coulombs of electric charge and 500 megajoules of energy.
Statewide, 19 wildfires greater than 1,000 acres in area are currently raging, according to the NIFC. The active fires have ravaged more than 630,000 acres, destroying approximately 200 homes and threatening another 12,000, according to Washington state officials.
During 2011, a total of 73,484 wildfires burned an estimated 8,706,852 acres (35,235 square kilometers) of land across the United States. Wildfire activity during 2011 was exceptionally high and was only exceeded in the historical record by wildfire activity during the years 2006 and 2007.