Nation must adapt to greater wildfire risk

Droughts, floods, severe storms, and sea-level rise often get the lion's share of attention in the litany of projected effects from global warming. But October's disastrous wildfires in California – part of one of the most intense fire seasons in the United States in nearly 50 years – are likely to raise the profile of such events, even if a firm link between the state's fires and climate change has yet to be made.

Planning for how to adapt to larger and more frequent wildfires is under way. It includes building homes with fire-resistant roofs and windows, and landscaping with fire-resistant plants. It also means planning new communities with streets wide enough to handle evacuation traffic even when the curbs are lined with fire trucks.

It also means changing the way people think about their homes and surrounding property. And it means maintaining homes and property over time: Adapting to new wildfire risks is not a one-time event, experts say.

People who live in flood plains or hurricane zones generally "understand the need to adapt and to build differently," says James Smalley, who heads the ­wildfire-protection program at the National Fire Prevention Association in Quincy, Mass. "But people who live in natural settings don't quite get it yet – that you can adapt, that you can still have a natural, beautiful setting. You have to understand that fire is part of the natural landscape. So you have to adapt."

Global warming is expected to increase fire hazards in the western United States under a range of global-warming scenarios. But the greatest increase in risk, some researchers say, is likely to come in the East and Southeast. There, snowmelt and rainfall are unlikely to slake the increasing thirst of trees and shrubs as CO2 spurs their growth during longer, warmer growing seasons. This could leave more of the eastern woodlands drier and more vulnerable to wildfires by summer's end. Meanwhile, some of the most dense mingling of homes and woods – what experts call the wildland-urban interface – can be found in the eastern US.

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