Saltwater creeps inland as Po Delta faces critical drought

The Po River Authority reported Friday that northern Italy's waterways are in a critical state, with the Po itself so depleted by sustained heat that saltwater intrusion now reaches 18 kilometres inland from the Adriatic, according to Devdiscourse. The phenomenon threatens both the productive agricultural plain of Emilia-Romagna and the Ramsar-protected wetlands that form the delta's ecological core. The Guardian reported Saturday that Italy endured record temperatures above 40 degrees Celsius as a heatwave linked to dozens of deaths across western Europe spread eastwards, with the weather system setting new records as it moved through the continent.

The Po Delta sits at the heart of Emilia-Romagna's food economy. The region produces Parmigiano-Reggiano, prosciutto, and balsamic vinegar—exports that depend on the freshwater aquifers and irrigation networks fed by the Po and its tributaries. Saltwater intrusion degrades both soil and groundwater, rendering land unsuitable for dairy pasture and the crops that feed livestock. The Local Italy reported Friday that Veneto, the neighbouring northeastern region that encompasses Venice, declared a state of emergency over drought, with rainfall from January to May running more than a quarter below 2025 levels. The Po Delta straddles the Emilia-Romagna–Veneto border; the crisis affects both.

The Po River Authority's warning came as the broader heatwave began to fracture. The Local Italy reported Friday that seven regions across Italy remained under storm alerts as a cold front moved southwards, bringing violent conditions to parts of northern and central Italy on Wednesday and Thursday. Yet the respite is forecast to be temporary. The Guardian's coverage of the wider European heatwave suggests the system is moving eastwards rather than dissipating, and summer is only beginning. For Emilia-Romagna's cooperatives and family farms, the question is not whether the drought will end, but whether the delta's freshwater reserves—and the productivity they sustain—can survive the months ahead.