With the current European summer in mind Climate Scientist David Viner makes an educated guess. During an interview with Reuters International he states tourists from the northern Europe may stay at home in future and do not spend billions of Euros in the South simply because it is too hot.

reuters.com: Mediterranean beaches may get too hot for tourists: report

ftd.de: Klimawandel könnte Touristenströme auf den Kopf stellen.

boursier.com: Le sud de l’Europe un jour victime touristique de la canicule?

diariolibre.com: Un futuro caluroso para la costa mediterránea.

globo.com: Praias do Mediterrâneo podem ficar quentes demais para turismo.