Extreme heat in Mediterranean tourist municipalities is not only a climatic problem but also a planning and management problem, because the spaces that sustain tourism and those that sustain everyday resident life are not governed in the same way. This article examines how economically vulnerable households experience heat in Lloret de Mar, Catalonia, and uses that evidence to clarify priorities for local adaptation planning. The study is framed as an exploratory mixed-method case study combining semi-structured interviews and participatory mapping with 28 households (77 household members) recruited through the Food Distribution Center of C`aritas Lloret de Mar. Triangulation across closed-response items, open-ended accounts, and mapped locations shows a pronounced gap between the tourist image of summer comfort and the lived thermal reality of low-income residents. More than half of participants reported summer thermal discomfort at home, half reported difficulty bearing cooling-related utility costs, and electricity bills emerged as the most problematic household expense. Coping depended primarily on low-cost domestic strategies, especially fans, cross-ventilation, and persianas, while air conditioning was present in some homes but rarely used because operating costs were prohibitive. Participatory mapping revealed concentrated exposure along main roads, service routes, and dense central areas, alongside an emergent reliance on informal cool refuges such as the public library. The article argues that local adaptation planning should move from generic heat messaging toward place-based, socially targeted interventions: formal climate shelters, shaded everyday mobility corridors, and publicly managed cool commons, while recognizing that the findings are intentionally case-specific rather than statistically generalizable.