Globally, the consequences of climate change have rapidly necessitated local government action to mitigate and adapt to rising sea levels, increased storm frequency, and higher temperatures. Acknowledgement of underlying climate issues, however, varies widely across regions and towns. Using critical discourse analysis (CDA), this paper evaluates the climate change acknowledgment of five municipality sustainability action plans (SAP) in coastal Florida and the broader implications for sustainable development. Public pressure, environmental champions, and recent storm events causing infrastructure damage were identified as key factors underpinning coastal climate change acknowledgement. Notably, the plans that admitted the anthropogenic causes of climate change were more optimistic and action focused. By emphasizing local mitigation efforts and opportunities, they were more empowering than those that treated climate threats as inevitable external circumstances. Anthropogenic climate change acknowledgment is thus a powerful tool for local governments to catalyze action when developing their sustainability goals and plans.