What does the alert level mean for holidaymakers in the south?
The alert level applied to the whole island of El Hierro on 20 October 2026, not just to Valverde. Even those staying in holiday spots such as Tamaduste or La Restinga had to expect heavy showers and possible thunderstorms. The official advice is aimed at residents and visitors alike.
During the heavy rain, holidaymakers should stay in their accommodation where possible. Barrancos, the often dry stream beds, flood zones, side roads and forest tracks should be avoided. The water can rise very quickly there.
Anyone driving a hire car should use main roads and reduce speed. Flooded roads or bridges should not be driven on or crossed if water was flowing over them. If the vehicle began to fill with water, it should be abandoned.
How much rain was measured on the island?
The highest measured amount was reported by the AEMET station in Valverde with 118.4 litres per square metre, as El Hierro Hoy reported. That is almost double the official threshold of 60 millimetres in twelve hours cited by the authorities for the warning.
At El Hierro Airport, the station recorded 83.7 litres per square metre. In Tamaduste, 77.7 litres were measured.
The data correspond to the latest available updates from each station and are not a final daily total.
Which official warnings applied when?
On 20 October 2026 at 13:15, the alert level was raised. The basis was information from AEMET and the Canary Islands emergency plan PEFMA.
For 21 October 2026 at 09:00, a lowering to pre-alert level had been announced. Heavy, at times thundery showers continued to be forecast, along with thresholds of 15 millimetres in one hour and 60 millimetres in twelve hours.
What should residents and visitors actually do?
The Dirección General de Emergencias recommends staying at home where possible during heavy rain. Roofs and drains should be checked. Overloaded barrancos should be reported to the relevant Ayuntamiento, the local council.
The emergency number 112 is intended exclusively for acute emergencies. For general information, the number 012 is available. This separation is important so that emergency lines remain free in genuine emergencies.
Specific road closures, evacuations, building damage or cancellations of ferries, flights and schools were not mentioned in the available sources. Nor is there any information on compensation or special application deadlines.
What happens after the warning?
After the announced downgrade on 21 October 2026 at 09:00, the rainfall risks remain. The authorities continue to warn of heavy showers and possible thunderstorms. The thresholds of 15 millimetres per hour and 60 millimetres in twelve hours continue to apply.
New instructions from the Gobierno de Canarias, the island government and the municipalities are authoritative. Anyone travelling on El Hierro should check the current alert levels before excursions. The official channels of the Dirección General de Emergencias and AEMET provide the binding information.
The measurements from 20 October 2026 show that rainfall amounts varied greatly from place to place. While Valverde recorded 118.4 litres, the amounts at other stations were significantly lower. The weather on the small island can therefore differ greatly from one place to another.