Vulnerability refers to the predisposition to suffer adverse effects when exposed to a climate event. There are many factors that influence whether or not a person is vulnerable to extreme climate events. Vulnerability is rooted in social, economic, demographic, and geographic factors, and can vary based on these influences. Overall, vulnerability can determine the magnitude and distribution of health impacts, exacerbating already challenging situations or introducing new challenges for communities. Through understanding vulnerability, community decision makers are able to develop adaptation and resilience strategies specific to their community’s needs, lessening overall vulnerability and decreasing health impacts.