Extreme heat is altering when, where and how we travel: new research

fcafotodigital/Getty Before booking a holiday, it pays to check the weather. Rain can turn a joyful trip into a glum stretch of days. Soaring temperatures are making sunny summers less appealing. And destructive fires, floods and other natural disasters often lead to tourist evacuations. Australians are keen travellers. In 2025 alone, we made about 113 million overnight trips locally and more than 12 million trips abroad. We also live in one of the world’s most heatwave-prone nations, meaning…