Palma's Son Sant Joan Airport had the third highest number of "incidents" between June and August last year.
Palma has seen the largest increase, with rents soaring by 55% since 2013.
It is claimed that people are going to beaches in other municipalities because of worries about the water.
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The historical maximum that is normally quoted was 44.2C in Muro in July 1994.
Acting prime minister Pedro Sánchez failed last week in his bid to be confirmed as premier.
Fourth Day of this annual event taking place in Palma. Watch impressive video.
The Moors and Christians battle in Pollensa; one of the most anticipated fiesta events.
Something to consider for a day out at the beach is the picnic, along with preparation of a further snack later.