Since 2009, the San Diego region’s local governments and public agencies have been working with ICLEI and The San Diego Foundation to address impacts of climate change in the region. This collaboration has resulted in developing the Sea Level Rise Adaptation Strategy for San Diego Bay, which was followed by a series of workshops and meetings to facilitate the implementation of the strategy. Considering the fact that Hazard Mitigation plans are the traditional planning foundation for reducing risks from climate-related extreme events, stakeholders identified the Hazard Mitigation Planning update process scheduled for review by Federal Emergency Management Agency (FEMA) in 2015 as an opportunity not to be missed. ICLEI collaborated with the San Diego County Office of Emergency Services (OES) and Dr. Dan Cayan at Scripps Institution of Oceanography (SIO) to integrate climate adaptation into the region’s Hazard Mitigation Plan update.