How do wildfires create lightning, pyro tornadoes and thunderstorms?

WestJet has already begun parking its aircraft ahead of a possible strike by its flight attendants on Sunday. Because the airline has not yet reached a deal with the union representing its cabin crew, parking the planes “minimizes the risk of stranding guests and aircraft,” the airline said in a news release Friday. Also the move lets WestJet “maintain operational control and protect the integrity of the broader network.” Flight attendants, represented by CUPE Local 8125, served a 72-hour strike notice Thursday. WestJet issued a lockout notice of its own shortly after, which would let...