Summer seasons have been challenging in warm countries in recent years, assuming due to human-driven climate change. Uncontrolled carbon dioxide emissions continue to trap more heat in the atmosphere, resulting in higher temperatures every year. Global Climate Highlights said 2023 was the hottest year since 1850, surpassing 2016. It was 1.18°C warmer than the 20th-century average and 1.35°C above the pre-industrial average temperature. Tourism Review presents the hottest countries around the world.