Preparing for Tsunamis: Spain's Coastal Towns Take Action

Southern Spain, particularly the Costa del Sol, is situated near the Alborán Sea fault system, where the African and Eurasian tectonic plates meet. This region experiences frequent seismic activity, with earthquakes often unnoticed by residents and tourists. A notable tremor occurred in December 2025, registering a magnitude of 4.9 off Fuengirola, prompting emergency calls but causing no damage. Despite the area's seismicity, the risk of tsunamis is rarely acknowledged, particularly in tourist-heavy locales like Málaga.

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In contrast, the town of Chipiona, located approximately 25 miles from Málaga, has taken significant steps to prepare for potential tsunamis. Under the leadership of Mayor Luis Mario Aparcero Fernández, Chipiona became Spain's first "tsunami ready" community in 2024, recognized by the Intergovernmental Oceanographic Commission (IOC) of UNESCO. The town has implemented evacuation routes, installed sirens, and conducts annual drills coinciding with the anniversary of the devastating 1755 Lisbon earthquake, which generated waves that impacted the region.

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The IOC aims to establish 25 tsunami-ready communities by the end of 2026, with a broader goal of preparing all at-risk communities by 2030. Francisco Castro, Chipiona’s tsunami-ready coordinator, emphasizes that certification signifies preparedness rather than the absence of risk. Recent seismic activity in the Gulf of Cádiz has raised concerns, with experts noting that while small quakes do not predict larger ones, caution is warranted. Chipiona's emergency plans include designated meeting points within a 20-minute walk, advising residents not to rely on vehicles for evacuation.

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While Chipiona has made strides, many areas along the Costa del Sol remain in the early stages of tsunami preparedness. Public signage and evacuation routes are often inadequate, and urban development has compromised natural coastal defenses. Miriam García, a geomorphologist, highlights that decades of construction have diminished the resilience of the coastline, making it more vulnerable to both gradual sea level rise and sudden hazards. Current building codes in Spain address seismic resistance but lack specific requirements for tsunami impacts.

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Experts like Jorge Macías, a tsunami modeller, describe the risk as "low probability but high impact," stressing the importance of immediate action during seismic events. The Andalusian regional government approved an emergency plan in 2023, mapping flood zones along 500 miles of coastline. Juan Vicente Cantavella, director of Spain's National Tsunami Warning System, warns that tsunami waves, even at lower heights, can carry significant energy and cause substantial damage.

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Despite the progress in Chipiona, the lack of preparedness in other municipalities raises concerns. The historical reluctance to discuss tsunami risks due to tourism-related fears is shifting, as public awareness grows. The need for comprehensive planning and community engagement is critical to ensure that all coastal towns are equipped to handle potential tsunami threats.

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• “If you feel something really strong near the coast, don’t wait for the alert,” — Jorge Macías, Tsunami Modeller

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• “Instead, it recognises preparation, awareness and planning.” — Francisco Castro, Tsunami-Ready Coordinator

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• “If the relationship between urban development and coastal dynamics is not reconsidered,” — Miriam García, Geomorphologist

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As Spain continues to grapple with its tsunami preparedness, the lessons learned from Chipiona may serve as a blueprint for other coastal communities facing similar risks.

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