Fort McMurray wildfire will leave toxic legacy: experts | The Chronicle Herald: "EDMONTON — Danger from the Fort McMurray wildfire that has destroyed entire city blocks in the northern Alberta city won't end when the flames stop.
Research from California fires that have burned through homes and communities suggests such blazes leave a threatening legacy of caustic ash and toxic heavy metals.
"There's no doubt, it is hazardous," said Scott Stephens, a fire scientist at the University of California Berkeley.
California has sad experience with wildfires raging through urban areas. Every summer, said Stephens, the state loses homes to marauding flames from the wood"
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