Defining what happened as mere “bad weather” reduces a complex phenomenon to a temporary meteorological episode. Concentrated heavy rainfall, unusually intense storm surges and widespread landslides show that the parameters we use to interpret climate risk are no longer sufficient.
For years, climate change has been portrayed as something happening elsewhere: hurricanes in the United States, floods in Asia, extreme events perceived as distant.
In January, however, Italy experienced similar dynamics within its own territory.
Sicily, Sardinia and Calabria were hit by a weather system of exceptional intensity linked to the Mediterranean cyclone “Harry”: heavy rainfall concentrated within a few hours, very strong winds, and storm surges with waves reaching up to 9 metres.
The impacts were immediate and tangible: damaged infrastructure, disrupted connections, halted economic activity, and areas made inaccessible.
The government declared a national state of emergency, allocating €100 million for immediate response measures. But the scale of the event cannot be measured only in emergency funds: early estimates speak of more than €1 billion in damages in Sicily alone.
Not a winter storm, but an out-of-scale event
The information recorded between 18 and 21 January outlines an anomalous picture in terms of extent, intensity and speed.
In some areas of eastern Sardinia, particularly along the slopes exposed to moisture-laden flows, rainfall exceeded 500 mm in just a few hours, with accumulation concentrated in time windows too short for the soil to absorb. Wind gusts surpassed 120 km/h, while storm surges struck with sustained force, damaging ports, coastal roads and stretches of shoreline that were already vulnerable.
In Sicily, in Niscemi, the combination of intense rainfall and ground instability triggered a landslide extending over four kilometres, with a wide sliding front that made it necessary to evacuate more than 1,500 people. These are not isolated episodes, but systemic effects generated by events that are increasingly concentrated and violent, events that exceed the thresholds for which infrastructure and territories were originally designed.
A Mediterranean under stress: cumulative impacts on territories and infrastructure
The point is not the existence of violent atmospheric phenomena, which are part of the Mediterranean’s climatic history, but the way they manifest today and the impact they produce on already fragile systems. In recent years, a recurring combination of factors has drastically reduced the ability of territories to absorb shocks:
- higher sea-surface temperatures, increasing the energy available to disturbed weather systems
- rainfall concentrated in very short time windows, rather than distributed over time
- rapid shifts between drought and extreme rainfall, hitting soils that are sealed by impermeable surfaces or already saturated
- progressive coastal erosion, making shorelines and infrastructure more vulnerable to storm surges
- urbanisation and maintenance gaps, which limit the territory’s natural buffering capacity
The result is not a linear increase in extreme events, but a rise in the intensity of individual episodes. Rainfall that in the past would have been spread over several days is now concentrated in a few hours; storm surges that exceed historical thresholds strike coastlines that are already weakened.
A risk management issue, not just “bad weather”
Land management today requires an approach that can integrate continuous monitoring, infrastructure maintenance and adaptation policies built on updated and methodologically robust foundations—not on historical averages that are no longer reliable. The quality of the information underlying decisions therefore becomes central: without reliable foundations, even the most ambitious strategies remain exposed to structural errors.
This is the level at which TreeBlock’s approach operates. In a scenario where climate risk is evolving rapidly, validating the foundations and the tools used to analyse impacts, scenarios and vulnerabilities is not a technical detail, but a necessary condition for decisions that hold up over time.
Conclusion
What happened in Sicily and Sardinia is not an exception, but a concrete signal of a climate that is reshaping the operating conditions of territories. Sustainability, in this framework, is not a language or a set of statements of principle: it is the ability to design, manage and adapt systems, infrastructure, economic and territorial, to a reality that has already changed, starting from solid and verifiable foundations.