Arctic on Fire | World Policy Institute

On June 19, 2015, a slow-moving low-pressure system with spectacular thunderstorms that produced little rain began making its way through Alaska. By the time the storms finally petered out about a week later, 61,000 bolts of lightning had been unleashed on a boreal forest in the state. No one had ever seen anything quite like it, not even in 2004, when 8,500 lightning strikes were recorded in a single day.