Adaptive mobility responses during Hurricanes Helene and Milton in 2024.

Area of Science:

• Climate science
• Disaster management
• Human mobility studies

Background:

• Climate change intensifies tropical cyclones, increasing societal risks.
• Effective adaptation strategies are vital for mitigating hurricane impacts.
• Understanding human behavior during disasters is crucial for preparedness.

Purpose of the Study:

• To analyze human mobility patterns in response to tropical cyclones.
• To investigate how historical hurricane exposure influences adaptive mobility.
• To inform disaster preparedness by examining regional differences in response.

Main Methods:

• Utilized 355.5 million high-resolution foot-traffic records from mobile devices.
• Analyzed human mobility data during Hurricanes Helene and Milton (2024).
• Compared mobility responses across geographic regions with varying hurricane exposure levels.

Main Results:

• Hurricane Milton (coastal, high exposure) caused significant pre-landfall travel increases and sustained post-disaster mobility.
• Hurricane Helene (inland, lower exposure) resulted in modest, within-variation mobility changes.
• Coastal counties within Helene-affected regions exhibited stronger mobility responses than inland counties.

Conclusions:

• Human mobility adaptation to hurricanes varies significantly with historical exposure.
• Disaster preparedness and response strategies must be customized to regional characteristics.
• Mobility data offers insights into population behavior during extreme weather events.