What question did this study set out to answer?

To investigate how staff at the British High Commission perceive and utilize short text warning messages during emergencies.

February 23, 2026Open Access

Short text emergency warnings in high-risk settings: Behavioural and representational insights from the British high commission (BHC) in Nairobi, Kenya

Key Points

To investigate how staff at the British High Commission perceive and utilize short text warning messages during emergencies.
Conducted a cross-sectional mixed-methods survey among staff at the British High Commission in Nairobi.
Examined preferences across five message components: location, guidance, incident description, time to act, and source.
Applied Effective Use Theory, Nudge Theory, and the Protective Action Decision Model to understand message utility.
Identified spatial specificity, imperative guidance, and temporal urgency as the core triad of high-utility content.
Found that staff roles and mobility patterns significantly affect message needs and interpretations.
Demonstrated that message source importance decreases once trust is established in institutional channels.

Abstract

Effective emergency warning systems rely not only on technological infrastructure but also on message design that supports rapid, accurate, and context-appropriate decision-making. As short text warning messages (STWMs) become central to institutional crisis communication systems, understanding their optimal structure and how staff interpret them during real emergencies has become a critical practical and theoretical question. This paper examines staff perceptions of STWMs within the British High Commission (BHC) in Nairobi, Kenya, a high-risk organisational environment characterised by dispersed mobility patterns, multi-level responsibilities, and heightened security threats. Drawing on Effective Use Theory (EUT), Nudge Theory (NT), and the Protective Action Decision Model (PADM), this paper develops a refined conceptual framework explaining how representational fidelity and behavioural design interact to shape message utility. Using a cross-sectional mixed-methods survey, the paper identifies staff preferences across five message components: location, guidance, incident description, time to act, and source. Findings demonstrate that spatial specificity, imperative guidance, and temporal urgency constitute the “core triad” of high-utility content, while message source becomes less salient after trust is established. Variations across staff roles, working regimes, and risk proximity highlight the need for role-sensitive and mobility-aware tailoring. The paper argues that effective institutional warning messages must balance cognitive efficiency, behavioural prompting, and contextual relevance. The study contributes new empirical evidence and a refined theoretical model that can guide STWM design in diplomatic, governmental, and humanitarian organisations operating in high-risk environments. • Emergency warning effectiveness in diplomatic missions depends on a core triad of location, guidance, and urgency information. • Staff roles, mobility patterns, and residential proximity significantly shape message needs and interpretations. • Message source becomes less important once institutional trust in official channels is established. • Staff prefer concise, directive, behaviour-focused STWMs supported by predictable update rhythms. • Multi-platform alerting (SMS + WhatsApp + email) increases reach, redundancy, and protective action reliability.

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