Lumber futures rose the most in more than a year on concern that wildfires in western Canada will reduce supply and spur more curtailments at sawmills.  British Columbia declared a state of emergency and Canfor Corp. said it would trim output as the fires snarl transportation and supply chains. Lumber futures jumped more than 7 per centin Chicago.  The rebound extends wild gyrations that took lumber prices from a record high in May on a pandemic-fuelled construction boom to an eight-month low earlier this week after demand eased and supply was replenished. British Columbia ...