The Morning Edition After the flood: Exploring the link between disasters and dementia
Mar 29, 2026
Benjamin Preiss, regional editor who reports on disasters and communities, explores how floods coincided with cognitive decline in elders. He shares firsthand accounts from Rochester, discusses research linking floods to increased dementia risk, and highlights how stress and routine loss can unmask memory problems. He also outlines the need for dementia-aware disaster responses and practical warning signs to watch for.
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Rochester Couple's Flood Evacuation And Aftermath
- Benjamin Preiss met Brian and Glenys Mulcahy while covering the 2022 Rochester floods and helped them move furniture as floodwaters rose into their home.
- The couple later moved to a caravan after 10 inches of water entered their house and the reporters kept in touch as repairs and recovery dragged on.
Rapid Cognitive Decline After The Flood
- After relocating to a caravan, Brian collapsed, was taken to hospital and spent time in a mental health facility before being diagnosed with dementia.
- Glenys reported his rapid decline happened in the days and weeks immediately following the flood, surprising family and first responders.
Floods Can Unmask Or Increase Dementia Risk
- Research and experts suggest floods can increase dementia risk or unmask pre-existing conditions via prolonged stress, disrupted routines and reduced access to healthcare.
- Benjamin cites a 2025 Monash/China study and examples from Japan showing rises in dementia medication after floods.