Update 28 June: Well they weren’t wrong that the heatwave will begin to disperse slowly. It barely feels any cooler today than yesterday, but there is at least the merest suggestion of a hint of a breath of cool air. Tomorrow, though, it should be cooler still, and the above picture shows that Aemet has removed the yellow alert as from tomorrow for the western islands. Literally a breath of fresh air!
Update 25 June: Aemet says that the heatwave will continue until Thursday, with temperatures increasing until tomorrow and Wednesday, when temperatures are expected to reach 38º. BBQs remain banned in mountain recreational areas while the heatwave continues. Thursday should see temperatures begin to return to normal for the time of year, though Aemet says it will not cool off quickly, but will disperse gradually.
Update 24 June 11.30pm: The Tenerife Cabildo has banned BBQs in the mountain areas while the heatwave lasts.
Update 24 June: The yellow alert for Tenerife for Monday is now extended to all western islands, and increased to orange for altitude in Tenerife itself, where temperatures of up to 38º expected. Elsewhere, Aemet is forecasting temperatures of up to 36º.
Update 23 June: Aemet has issued a yellow alert for Tenerife for Monday for temperatures up to 34º. The yellow alert that is currently in place for the eastern islands is raised on Monday to orange for temperatures up to 37º.
Update 22 June: And here we go. Aemet has activated a yellow alert for Gran Canaria, Lanzarote and Fuerteventura for Sunday for temperatures up to 34º. It’s not an alert for Tenerife yet, but it will be.
Original post 21 June: Aemet is forecasting a heatwave starting this weekend with temperatures above 30º expected throughout the Canaries. The law stops alerts being issued more than 60 hours in advance, but the Tenerife Meteorological Centre director, Víctor Quintero, said that one is likely to be issued on Friday. The Azores anticyclone is responsible, bringing hot air from the African continent, and Sr Quintero added that an African warm air system is also expected which should make thermometers shoot up. I remember this same thing happening a couple or so years ago: it lasted a fortnight and became pretty horrible.