What applies to Tenerife on 2 November?
The Canary government keeps Tenerife on prealerta on 2 November, while it declares alerta for three other islands. The emergency directorate (Dirección General de Emergencias) issued the notice, and Diario de Avisos reports it.
For Tenerife, the authority expects heavy showers that could reach or exceed 20 millimetres an hour. They are most likely to hit the north and the greater Santa Cruz–La Laguna area.
The notice does not single out the south and its holiday resorts. That is no all-clear, because the authority speaks of considerable uncertainty over where, how hard and for how long it will rain.
Prealerta is a readiness level, not a closure. Anyone out and about should follow the weather forecast, as the directorate can change its rating if needed.
Where is Monday more serious than on Tenerife?
La Palma, El Hierro and La Gomera are on alerta from the early hours of 2 November. The authority expects a lot of convection there, meaning rising air that brings strong thunderstorms and showers.
The showers are scattered but can be very intense. The forecast allows for more than 30 millimetres in an hour.
Rain is most likely until 15:00. The authority expressly does not rule out that it lasts into the afternoon.
If you plan a day trip from Tenerife to one of these islands, check conditions first. The notice says nothing about ferries, flights, schools or cancelled events, and there is no other confirmed information.
What should residents and visitors do now?
In earlier rain episodes, the emergency directorate repeatedly gave out similar advice. It comes from the episodes of October 2024 and October 2026, not from the notice of 2 November.
In the heaviest rain, it recommends avoiding unnecessary journeys and keeping your distance on the road. Drivers should slow down and check brakes and tyres beforehand.
Nobody should cross a barranco (ravine) or riverbed that has filled with water. Nor should you park in a barranco bed.
At home, the authorities advise checking roofs, gutters and drains, and securing windows and doors. Keep water, medicines and a battery radio close at hand.
If water gets into the house, switch off the power and avoid cellars and lifts. That applies especially to ground-floor holiday flats.
What exactly do prealerta and alerta mean?
The levels are called prealerta, alerta and alerta máxima. They belong to the PEFMA emergency plan, which the emergency directorate applies.
The weather-risk plan was approved by Decreto 186/2006 of 19 December 2006.
The government’s levels are not the same thing as the colour warnings from AEMET (the state weather service). AEMET warns in yellow, orange or red, while the government rates the situation by its own judgement, drawing on AEMET and other sources.
If you need them, check AEMET’s own website.
How did earlier rain episodes go, and what is still open?
On 22 October 2026, an alerta already applied once before to El Hierro, La Gomera and the east of La Palma. According to RTVC, AEMET issued orange with up to 30 litres per square metre in an hour and up to 100 litres in 12 hours.
Tenerife stayed on AEMET yellow and on the government’s prealerta at that time. The pattern matches that of 2 November.
In March 2026, the low “Therese” showed what heavy rain can do in the greater Santa Cruz area.
On Tenerife, eight barrancos count as a risk in heavy rain, RTVC reports. The Cabildo (island government) monitors them with water-level gauges.
On 3 November, rain should continue on the mountainous islands, with a lower chance and less intensity than on Monday. The authority gave no end date for the prealerta or alerta, and there is no schedule for updates so far.