Turkey flood study finds 14.6 million people and $558 billion in economic activity exposed to risk

A new study of a fatal flooding event in Istanbul estimated that 14.6 million people and $558 billion in economic activity were exposed to weather-related risks, highlighting the importance of preparing cities for increasingly heavy rains.

Here's what to know

Climate shifts increased the Oct. 14 storm's rainfall by approximately 7% and strengthened its winds by 9%, according to a ClimaMeter analysis covered by Türkiye Today. 

The clearest rainfall increases were in western and northwestern Anatolia, with the Black Sea coastline north of Istanbul especially affected.

The Oct. 14 flooding claimed at least nine lives and caused widespread disruption across Istanbul, according to Türkiye Today. Authorities recorded 15 landslides and 1,277 flooding incidents as severe weather swept through the city.

What can be done?

Heavy rainfall put pressure on drainage systems and urban development in northwestern parts of Turkey, where the study linked roughly 3% of rainfall-related damage to Earth's warming.

Urban planning and drainage infrastructure need to accommodate heavier downpours as the Mediterranean warms, study co-author Davide Faranda said, according to Türkiye Today. 

Emergency teams reportedly evacuated 595 people during the Oct. 14 weather event.

Where can I learn more?

Istanbul's flooding and similar events elsewhere show why communities need to understand where flood risks are greatest and prepare for heavier rain: 

• In the UK, 6.3 million properties face flood risk as a task force prepares for winter.

• In Wales, 1 in 7 properties face flood risk as officials warn residents.

• A Massachusetts scientist warns river cities need flood defenses as climate change intensifies rainfall.

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