Predictors for the Number of Warning Information Sources During Tornadoes

Area of Science:

• Public Health
• Disaster Preparedness
• Emergency Management

Background:

• Understanding factors influencing the number of warning information sources (WISs) is crucial for effective public warning systems.
• Previous research has not fully explored the predictors for the quantity of warning sources individuals utilize.

Purpose of the Study:

• To identify predictors for the number of warning information sources (WISs) used by residents in tornado-affected areas.
• To examine the role of social disparities in accessing multiple warning information sources.

Main Methods:

• Telephone survey conducted with 903 residents in Tuscaloosa, Alabama, and Joplin, Missouri, post-2011 tornadoes.
• Statistical analysis using Poisson regression and Zero-Inflated Poisson regression to identify significant predictors.

Main Results:

• Older age and possessing an emergency plan were significant predictors for a higher number of WISs in both cities.
• Education, marital status, and gender influenced warning reception and the number of WISs, varying by location.
• Findings indicate that social disparities affect not only the likelihood of receiving warnings but also the number of sources accessed.

Conclusions:

• Social and historical contexts significantly influence the predictors of warning information source diversity.
• The number of warning information sources (WISs) should be considered a key metric for evaluating warning system effectiveness, alongside the likelihood of receiving any warning.
• Public health strategies should address social disparities to improve equitable access to multiple warning channels.