The increasing summer heat is changing the way Swiss people travel. According to a survey, more than half of the population has already adjusted their travel plans because of the heat, or intends to do so in future. According to a representative survey carried out by Marketagent on behalf of the tour operator Dertour Suisse, 27% of the 1,000 respondents have already adjusted their holiday plans due to the heat. A further 29% intend to do so in future. Meanwhile, 37% do not plan to make any ch...