One reason for the clampdown - youth hostels don't charge the tourist tax.
Maximum temperatures set to hit 35ºC today and tomorrow.
"The irony of a tourist economy that both sustains and destroys at the same time."
In Mallorca, it marks what is often referred to as the official start of the tourism season.
Students at Queen's College celebrated World Book Day and Nursery children were on a scavenger hunt.
This week students at The Academy International School celebrated Earth Day and exhibition opening by Senior art students and a visit to an event at the Palma Convention Centre.