Icelandic authorities issue flood warning as Skaftárhlaup evolves near Skaftá caldera

The Icelandic Meteorological Office has reported the onset of a glacial outburst flood, known as Skaftárhlaup, originating from the western Skaftá caldera. Increased electrical conductivity and water flow measurements suggest that the situation is evolving. Civil protection authorities have issued a state of uncertainty, urging residents in the area to be vigilant.

The flood’s intensity is currently increasing gradually, but authorities believe it is small and developing slowly, with flows recorded just below 200 cubic meters per second. Although increased water flow likely will become noticeable along the Ring Road by tomorrow morning, experts do not anticipate a significant flood event.

Public safety officials advise tourists to avoid areas upstream of Skaftárdals and the edges of several glaciers, including Skaftárjökull, Tungnárjökull, and Síðujökull, until the flood peaks. The potential for hazardous conditions, including gas emissions from sulfur compounds that can irritate respiratory systems, has raised concerns. Cracks may also form around the glacier’s caldera, posing further risks.

Throughout the night, water flow in Skaftá near Sveinstind increased steadily, currently measuring about 173 cubic meters per second. Previous outbursts from this caldera have typically been less serious than those from the eastern caldera, and historical data indicates these floods occur every two years on average. Authorities plan to monitor the situation closely, with on-site measurements already underway.

Residents and travelers are urged to stay informed and prepared for possible flooding in the upcoming days, particularly near the banks of Skaftá.