Behavioral responses to wildfire smoke: Insights from smartphone location data

Area of Science:

• Environmental Health
• Public Health
• Behavioral Science

Background:

• Wildfire smoke poses significant public health risks, yet individual avoidance behaviors remain understudied.
• Understanding how people react to wildfire smoke is crucial for mitigating health impacts.

Purpose of the Study:

• To investigate individual behavioral responses to wildfire smoke exposure using smartphone location data.
• To identify demographic differences in smoke avoidance behaviors during the 2018 California wildfire season.

Main Methods:

• Utilized individual-level smartphone location data to track daily time spent at home, indoors, and at work.
• Analyzed behavioral changes in response to varying levels of wildfire smoke exposure.
• Compared wildfire smoke responses to those triggered by rainfall.

Main Results:

• High smoke levels led to increased time spent at home/indoors and decreased mobility/time at work.
• Behavioral adaptation to smoke began at levels significantly higher than those considered dangerous.
• Socioeconomic status, particularly education level, strongly influenced avoidance behaviors, more so than income.

Conclusions:

• A gap exists between smoke levels triggering behavioral adaptation and those harmful to health.
• Differential avoidance behaviors, especially by education, suggest awareness of risks, not just ability to adapt.
• Findings highlight the need for targeted public health communication regarding wildfire smoke risks.