The climate will continue to change even as greenhouse gas emissions come down. Some changes, such as sea-level rise, heat waves, and increases in storm intensity or frequency, pose major risks to Boston, its infrastructure, its tax base, and its residents. For these reasons, Boston has a responsibility to prepare for climate change, even as we work to lessen its impacts. Climate adaptation-preparing for the different local environmental conditions that result from climate change-is an essential part of climate action.