Heatwave responses in historical Shanghai relied on patchwork, unequal protection

When deadly heatwaves struck Shanghai between 1873 and 1949, the city’s response did not come from a mature policy system. Instead, according to a new historical study, it was a patchwork of limited preparedness assembled from existing channels of public communication, public health, municipal coordination, social relief and administrative control.

The study, published in Humanities and Social Sciences Communications, reconstructs summer extreme heat events in modern Shanghai by integrating temperature observations from the Xujiahui Observatory with modern newspapers and municipal archives. It focuses on three representative years, 1894, 1934 and 1942, to compare how heat shocks were transformed into social impacts and governance responses under different institutional contexts.

The research examines a period when extreme heat has become one of the most deadly climate risks in cities today, and asks a question the author says is rarely raised: where does a city’s heat-disaster response capacity actually come from? By tracing the historical record, the study finds that the early heat response in modern Shanghai was cobbled together rather than deliberately designed.

More strikingly, the analysis shows that this seemingly evolving response system was consistently accompanied by deep-seated unequal protection. Different social groups and urban districts faced vastly different levels of risk exposure and access to relief when heatwaves hit. The findings indicate that there was no linear relationship between heat intensity and social impact; governance interventions could buffer risk in some contexts, but unequal protection remained the norm.

Limited preparedness and unequal protection, the study concludes, constituted the central features of early heat-disaster response in modern Shanghai. The historical experience, the author argues, is a reminder that the legacy of heat-disaster response is not merely a story of technological evolution, but also a long-term challenge concerning equity and governance capacity.

Subject of Research: Historical heat-disaster governance and unequal protection in modern Shanghai, 1873–1949

Article Title: Early disaster response to extreme heat in modern Shanghai, 1873–1949: limited preparedness and unequal protection

Article References: Hu, Q., Liu, W., & Li, S. (2026). Early disaster response to extreme heat in modern Shanghai, 1873–1949: limited preparedness and unequal protection. Humanities and Social Sciences Communications. https://doi.org/10.1057/s41599-026-09515-8

Image Credits: AI Generated

DOI: 10.1057/s41599-026-09515-8

Keywords: extreme heat, heatwaves, Shanghai, disaster response, urban history, climate risk, public health, social equity, governance, Xujiahui Observatory, municipal archives, historical climatology