More heavy rain forecast over the coming hours.
"Summer high temperatures coming to an end..."
Temperatures will drop in Mallorca as storms move in.
Weather will improve on Sunday.
Temperatures inland set to hit 36ºC on Friday.
In Spain, helicopters dropped water on the flames as heat above 40 Celsius (104 Fahrenheit) and often mountainous terrain made the job harder for firefighters.
"Temperatures will start to rise again on Thursday..."
Aemet has issued a warning for very strong winds from the east and northeast.
The storm is expected to hit the islands around noon and last at least until 18:00.