Update 31 July: Aemet has withdrawn the yellow alert for heatwave, and forecast a notable reduction in temperatures for Monday, particularly in the medianías and at altitude.
Update 30 July: The Tenerife Cabildo has set up a team of 324 to monitor mountain areas and prevent fires during the current heatwave. The Cabildo has also issued a general request to the public to take extreme precautions in the mountain areas while present temperatures remain, to comply with any requests made by the forest watch team, and not to start any fires in areas at altitude. PV
Update 29 July: and the alert is now extended to Sunday too, for temperatures up to 34º.
Update 28 July: As expected, the alert has been extended, and now covers Saturday too, again during day time, between 11am and 7pm.
Aemet has announced a yellow alert for heatwave from Friday for Tenerife (tomorrow for Gran Canaria) for temperatures up to 35ºC. At present Tenerife’s alert starts at 11am on Friday and lasts until 7pm, though it is of course possible that the alert will be extended as the position becomes clearer.