Maximum shade temperatures will be around 25ºC today and tomorrow Saturday. There will even be a cool breeze in the south of the island. However, temperatures will rise again on Sunday and the beginning of next week will also be hot.
The dust in the air will fade over the weekend and should be gone by the end of Sunday.
Please note that the heat will be concentrated at higher altitudes. Even if it's cool at sea level it could easily be well over 30ºC up in the cumbres.
When we warn about the dangers of walking in the heat, it's for a good reason: A German walker died in Gran Canaria yesterday due to heatstroke.