Adaptation strategies are considered important in mitigating the mortality effects of warm temperatures, but less is known about the role of public health interventions. I study how the provision of three health-enhancing services―sanitary infrastructures, scientific-based infant care and hospital care―influenced the temperature-mortality gradient in Germany during the period 1888-1913. I find that: (i) the mortality impact of warm temperatures was substantial; (ii) heat-related mortality (infant deaths) decreased by ca. 25 (30) percent; and (iii) greater access to piped water, infant care and hospital care account for 60 (25) percent of the mortality decline at high temperatures