As we reported yesterday, a new study out from the Arctic Monitoring and Assessment Programme finds that climate change could cause global sea levels to rise as much as five feet this century, a major increase from the one-to-two feet the IPCC projected in 2007. This new projection, Flannery said, takes into account melting polar regions, whereas previous studies have relied mainly on the water-expanding effect of warmer ocean temperatures.

"This is serious," he said. "One-point-five feet is serious enough. Five feet I find incomprehensible. We've got to face emissions, yes, but we've also got to face the fact that we need to adapt to these rising seas, and that is going to be pricey. And we need to start now."

Flannery said that includes changing how and where communities implement transit and how they develop their waterfronts.

And -- actually -- the San Francisco Urban Planning and Research Association (SPUR) is trying to help Bay Area cities and agencies do just that with a report they've released today. The report, "Climate Change Hits Home,"points out that the Bay Area’s biggest risk from climate change this century will be more intense heat waves, water shortages, and rising seas, and it outlines an action plan for how communities can start addressing those threats.

You can listen to the full interview with Flannery as well as one with Laura Tam of SPUR about the Bay Area report on the Forum website.

Gretchen Weber is the Multimedia Producer of Climate Watch

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Climate Change: Alarming New Study; Report on Effects in Bay Area