The reservoirs will need a lot more rain and could do with some snow. | Photo: Archive
Andrew EdePalma21/10/2026 09:10
The storm that affected Mallorca from Sunday to Tuesday has made little difference to the two giant reservoirs in the Tramuntana Mountains. The combined levels of Gorg Blau and Cúber are in fact down slightly compared with a week ago.
The reservoirs, which supply Palma, are operated by the Palma municipal services agency Emaya. It reports that the combined levels have dropped to 32.71% from 32.91% a week ago, although the town hall says the impact of the storm may not be clear until next week. The figures were recorded on Tuesday and could yet fluctuate.
The met reported that 60 litres of rain per square metre fell in Escorca over a 24-hour period between Monday and Tuesday, an amount not significant enough to have a meaningful impact on the reservoirs.
As of October 20, the Cúber reservoir was at 36%, down from 38% a week ago. Gorg Blau was at 29.75%, up slightly from 29.5%.
The reservoirs are though in better condition than they were a year ago. On October 19, 2025, the combined reserve was 27.33%, almost five percentage points lower than the current level.
Aemet reports indicated that the areas where the most significant rainfall was recorded between Monday and Tuesday were in the south and in the Tramuntana Mountains. The heaviest was 79 litres of rain per square metre in Calvia (the Es Capdellà weather station), followed by Sant Elm with 72, Banyalbufar with 64, and then Escorca with 60.