Northern California is dealing with a catastrophic wildfire that’s growing by 20sq km every hour as firefighters struggle against steep terrain and strong winds. The blaze is thought to have been started by an arsonist allegedly rolling a burning car into a gully. It’s the state’s largest wildfire this year, having already burnt an area 5 times the size of New York City and caused a rare “fire tornado”. Governor Gavin Newsom says he’s “using every available tool to protect lives and property”. And over 2,000km north in Alberta, Canadians are fighting dozens of catastrophic blazes, including in Jasper where a lightning storm led to a 100m firewall that swept through the tourist town late last week. About a third of buildings were razed and Premier Danielle Smith says it’ll be “some time” before locals return.