Heightened Alert for Hydrogeological and Hydraulic Risks

The Regional Department of Civil protection in Sicily has issued an urgent weather advisory, raising concerns about potential hydrogeological and hydraulic risks across the region. Effective from 4:00 PM on May 14th through midnight on May 15th, the alert warns of adverse weather conditions, including showers and thunderstorms, that could lead to significant disruptions and potential hazards.

This declaration follows established protocols outlined in Legislative Decree No. 1 of 02/01/2018, PCM Directive 27/02/2004, and DPRS n ° 626/GAB of 30/10/2014, which govern the alerting system for hydrogeological and hydraulic risks in the region.

Regional Breakdown of Alert Levels

Specific alert levels have been assigned to different areas based on the anticipated severity of the weather. While a extensive breakdown wasn’t provided, initial reports indicate varying levels of concern across the Sicilian islands:

• Aeolian Islands: Moderate concern.
• Ustica: Moderate concern.
• Egadi Islands: High concern.
• Pantelleria: Low concern.

Understanding the Risk Levels

the alert system employs a color-coded scheme to communicate the level of risk and the corresponding operational phases:

• Green (Supervision): Generic vigilance is advised.
• Yellow (Attention): Increased awareness and preparedness are recommended.
• Orange (pre-alarm): Preparations for potential evacuation or protective measures should be underway.
• Red (Alarm): Immediate action is required to ensure safety.

For today, May 14th, a general state of vigilance is in effect. however, for tomorrow, May 15th, a pre-alarm phase has been activated across the entire region due to the elevated risk of thunderstorms and associated hydrogeological and hydraulic hazards.

Specific Concerns and Precautions

The Civil Protection notice emphasizes the potential for hydraulic criticalities, notably in minor basins (areas smaller than 50 square kilometers). Residents are urged to exercise extreme caution during showers and thunderstorms, especially in urban areas and near waterways. The notice specifically highlights the dangers associated with deceased in urban areas and places attended by man also near the waterways, suggesting a heightened risk of flash flooding and related incidents.

According to recent data from the European Surroundings Agency, extreme weather events, including heavy rainfall and flooding, have increased by 15% across Southern Europe in the last decade. This trend underscores the importance of heeding weather advisories and taking proactive measures to mitigate potential risks.

Official Recommendations

The regional Department of Civil Protection urges all residents and visitors to stay informed about the latest weather updates and to follow these recommendations:

• Monitor official weather forecasts and alerts.
• Avoid unnecessary travel during periods of heavy rainfall.
• Stay away from rivers, streams, and other waterways.
• Be prepared to evacuate if necesary.
• Report any hazardous conditions to the authorities.

Heightened Alert: Sicily Prepares for Adverse Weather Conditions

Sicilian authorities have issued a heightened alert for hydrogeological and hydraulic risk, effective from 4:00 PM on May 14, 2025, until midnight on May 15, 2025. This alert follows the planned release of water from several dams in the region, coupled with forecasts of significant rainfall.

Strategic dam Releases: Mitigating Potential Overflow

In anticipation of heavy rainfall, dam operators have begun releasing water from reservoirs to manage capacity and prevent uncontrolled overflows. Specific dams involved in these release operations include:

• Gammauta Dam (Sosio River): Releasing water at a rate of 25 cubic meters per second.
• Prizzi Dam (Raia River): Releasing water at a rate of 2 cubic meters per second.

These controlled releases are intended to mitigate the risk of more severe flooding downstream. Though, authorities caution that localized flooding is still possible along waterways affected by these releases.

Weather forecast: Heavy rainfall Expected

The weather forecast indicates a high probability of rainfall across Sicily, particularly in the western, southern, and northeastern regions. While rainfall is expected to be minimal on May 14, the forecast for May 15 predicts:

• Scattered to widespread rainfall, characterized by showers and thunderstorms.
• Moderate to high cumulative rainfall amounts, especially in western, southern, and northeastern Sicily.
• Potential for high-intensity showers, frequent electrical activity, hailstorms, and strong wind gusts.

The Strait of Sicily and the southern Ionian Sea are expected to become very rough, with the southern Tyrrhenian Sea also tending towards very rough conditions.

Civil Protection Measures: Readiness and Response

Local civil protection agencies are activating procedures outlined in their hydrogeological and hydraulic risk management plans. Mayors and relevant bodies are urged to implement preventative actions. The regional notice emphasizes the importance of monitoring local weather conditions and adapting response strategies accordingly.

The alert encourages local civil protection managers to pay close attention to local weather conditions and their variations, sometimes unpredictable and sudden, as well as the consequent effects to the ground even if feared or presumed.

Key recommendations include:

1. Timely dissemination of the alert notice to the public.
2. Informing the regional Operations Room for Civil Protection (SORIS) about the evolving situation.

Understanding Hydrogeological Risk: A Broader Outlook

Hydrogeological risk, encompassing both flooding and landslides, poses a significant threat in regions with specific geological and climatic conditions. According to a 2024 report by the European Environment Agency,climate change is exacerbating these risks across Europe,with the Mediterranean region being particularly vulnerable. Increased rainfall intensity and altered precipitation patterns contribute to higher flood risks and soil instability.

Sicily’s proactive measures, including dam management and civil protection preparedness, are crucial steps in mitigating the potential impacts of these increasing hydrogeological hazards.

Heightened Alert Issued for Weather-Related Geohazards

Sicilian authorities have issued a regional civil protection notice, raising concerns about potential hydrogeological and hydraulic risks across the region. The alert, which came into effect at 4:00 PM on May 14, 2025, remains active until midnight on May 15, 2025. This notice highlights the possibility of geomorphological criticalities, specifically landslides, and hydraulic issues in smaller basins, including floods and inundation in coastal areas.

Unpredictable Weather Patterns Compound Risk

The warning emphasizes that the potential for hydrogeological and hydraulic problems could be considerably amplified by showers, thunderstorms, and adverse weather conditions. The geographical location, distribution, and intensity of these weather events are subject to considerable uncertainty, making precise forecasting challenging. This unpredictability adds a layer of complexity to risk management and preparedness efforts.

Hydrogeological and hydraulic criticalities can be significantly more burdensome in case of showers or thunderstorms or conditions adverse meteorological whose geographical location, distribution and intensity are characterized by high uncertainty forecast.

Vulnerability Factors: Infrastructure and Location

The notice also points out that inadequate structural conditions of waterways and sewage networks can exacerbate the situation. Properties located near or within areas prone to hydrogeological and hydraulic instability are particularly vulnerable. Even with moderate rainfall, these factors can lead to more severe consequences.

In the presence of inadequate structural conditions of the waterways and sewage networks and in the case of goods located in proximity or within areas suitable for hydrogeological and hydraulic instability, critical issues can occur in more heavy way regardless of the expected and/or rain quantities of rain.

Dam Management and Downstream Effects

Operations carried out by dam managers could also trigger localized or widespread issues downstream,depending on river flows and ongoing maintenance of waterways. This highlights the interconnectedness of water management systems and the need for careful coordination during periods of heightened risk.

The operations carried out by the managers of the withholding systems can cause localized or widespread phenomena of valley to the valley of dams in relation to any further river contributions, as well as the maintenance of the waterways.

Wide Dissemination of Alert Information

The regional civil protection notice has been widely distributed to key stakeholders, including:

• Mayors of municipalities
• Prefectures and Territorial Government offices (UTG)
• Municipal Civil Protection offices
• National Fire Brigade
• Free Consortia and Metropolitan Cities
• Regional Command of the arma dei Carabinieri
• Traffic Police Compartments
• Basin Authority of the Hydrographic District
• Regional Department of Civil Protection
• Various regional departments (water resources, infrastructure, environment, etc.)
• Healthcare services (SUES 118)
• Park Authorities
• Utility companies (Enel, Terna, Snam Rete Gas, SICILIACQUE SpA)
• Cultural Heritage authorities
• Professional orders (architects, geologists, engineers, etc.)

This extensive distribution network aims to ensure that all relevant parties are aware of the potential risks and can take appropriate measures to protect lives and property.