Spotting dead trees that can fuel fires is challenging for forestry crews. Not so for drones, which can survey thousands of acres in a single afternoon… Forest managers are increasingly turning to them to pick out potential hotspots otherwise hidden in plain sight in a bid to protect critical infrastructure. …“Emergency preparedness and management and response are big, obvious fits right out of the gate,” said Bill Lakeland, co-founder and chief executive officer of Spexi, a drone imaging company based in British Columbia… Spexi — which has contracted with government and emergency management agencies across Canada — relies on a network of freelance pilots, who sign up for paid “missions” and agree to download proprietary software that allows the company to take control of their drones. …Researchers at BCIT and Northeastern University in Vancouver trained a computer vision algorithm on Spexi’s data to identify extreme fire risks from fuel loads hidden in vulnerable forests…