The month of April ended with a slight improvement in the water reserves of the Balearic Islands, reaching 53%, one point above the figure recorded the previous month (52%). This figure matches that of April 2024 but remains below the historical average.

By island, Mallorca saw a slight increase, rising from 53% to 54%. Menorca remains stable at 51%, while Eivissa continues its upward trend, reaching 40%, up from 39% the previous month.

Water reserves April 2025

The evolution of the reserves has led to mixed movements in drought management scenarios. Five Demand Units (DU) have seen declines in their indices: Menorca, Artà, Manacor-Felanitx, Tramuntana Norte and Formentera. Two DUs – Es Pla and Palma-Alcúdia – have remained stable, while three have shown improvement: Migjorn, Tramuntana Sur and Eivissa.

Despite these changes, no modifications have been made to the management scenarios. The Demand Units (DUs) of Tramuntana Norte and Tramuntana Sur remain in a normal situation, representing 17.6% of the territory. The remaining eight DUs – Menorca, Artà, Manacor-Felanitx, Migjorn, Es Pla, Palma-Alcúdia, Eivissa and Formentera – continue in a pre-alert scenario, covering 82.4% of the Balearic territory.

The overall index of the Hydrographic Demarcation currently stands at 0.475, a higher figure than a year ago (0.455), but lower than that recorded two years ago (0.555).

April dry and warm

According to the State Meteorological Agency (AEMET), April was a dry month across the archipelago, with an average rainfall of 15.1 litres per square metre, well below the usual 41.3 l/m². By island, Mallorca recorded 13.9 l/m² compared to a historical average of 43.8 l/m²; Menorca 28.4 l/m² (average: 36.4 l/m²); Ibiza 9.7 l/m² (average: 32.5 l/m²); and Formentera just 6.8 l/m² compared to an average of 23.2 l/m².

As for temperatures, April was very warm, with an average of 15.9 ºC and a positive anomaly of 1.2 ºC above usual values. This temperature increase may have contributed to higher evaporation, thereby hindering aquifer recharge.

Outlook for May

Given the current weather conditions, the start of the summer season and the low rainfall recorded, a decline in water reserves is expected during May. This forecast reinforces the need to maintain efficient management measures and raise public awareness about responsible water use.