Wildfires. The word has struck fear into the hearts of small and midsize rural communities for generations. Now, thanks to smoke blanketing parts of North America, urban America and the corporations headquartered there are beginning to understand themselves as vulnerable, too. Last week, East Coast cities from New York to Toronto and Montreal saw air quality rapidly decline to some of the worst in the world as smoke from wildfires in Canada drifts south. This means the conversation in Corporate America has moved beyond indoor air circulation or filtration, to encompass outdoor air quality as well.