The State Meteorological Agency (Aemet) has issued yellow alerts for several islands in the Canary archipelago due to a significant thermal rebound. A subtropical warm air mass will cause thermometers to exceed 35 degrees Celsius in wide areas during the first half of the week, an unusually warm situation for late May.

This heat episode will be accompanied by haze and the presence of mid and high clouds. Additionally, there is a possibility of isolated showers with thunderstorms due to the arrival of a small tropical atmospheric river.

The yellow alerts will be in effect this Tuesday between 11:00 AM and 8:00 PM. Affected areas include the peaks and the east, south, and west of Gran Canaria, as well as the entirety of Lanzarote and Fuerteventura. In these areas, generalized maximums of 35 ºC are expected, with a probability of reaching up to 37 ºC in the interior of Gran Canaria and Fuerteventura. In the northern midlands of Gran Canaria, temperatures around 34 ºC are anticipated.

For Wednesday, it is anticipated that exceeding 35 ºC generally will be more difficult, although the easternmost islands will maintain temperatures between 30 ºC and 35 ºC.

The increase in temperatures will also be notably felt during the night. Until Wednesday, it is expected that at least one municipality on each of the seven islands will register minimums above 20 ºC, consolidating the phenomenon of tropical nights. Punctually, torrid nights (minimums not below 25 ºC) are predicted, especially likely in Gran Canaria, Fuerteventura, and Lanzarote.

The detailed forecast for this Tuesday includes: in Lanzarote, maximums exceeding 34 ºC in the south; in Fuerteventura, maximums surpassing 34 ºC in wide areas; in Gran Canaria, maximums above 30 ºC and up to 34 ºC in the southern and western interior; in Tenerife, maximums exceeding 30 ºC and potentially reaching 34 ºC in the northeastern midlands and southern and western slopes; in La Gomera, maximums of up to 34 ºC on the southern slope; in La Palma, maximums reaching or exceeding 30 ºC locally on the western slope; and in El Hierro, maximums touching or exceeding 30 ºC on the southern and eastern slopes.

Regarding sea conditions, northeast winds of force 2 or 3 are expected, increasing to 3 or 4 on the southeast and northwest slopes, with choppy to moderate seas. In the southwest, winds will be variable from force 1 to 3, with a northerly swell and waves of 1 to 2 meters.

From Thursday onwards, meteorological models indicate the withdrawal of the subtropical warm air advection and the entry of a milder air mass, which will normalize thermal records throughout the archipelago.