Key Message
New study reveals the impact of climate on diarrheal diseases in Taiwan. Anomalies have been adopted to represent the changes in the historical context of climate. Temperature anomaly was linked to increased infectious diarrhea, especially in the young population. Anomaly in surface water storage (SWS) was associated with higher rates of viral diarrhea. Extreme weather events further contribute to the risks. Urgent need for strategic planning and early warning systems to combat climate change and improve resilience are recommended.