Through a case study of the Promotores de Salud network in the US-Mexico borderlands, Schur Petri shows how local actors can be instrumental in communicating climate risks on the ground. In a region where water contamination compounds the existing problem of water scarcity, both scientific knowledge about climate change and water-filtration technology to remove contaminants had failed to adequately address either threat. Yet a partnership with community healthcare workers was able to link climate risks to existing local concerns and ultimately develop more effective solutions.