Will climate change make it too hot for humans to live? In today's planetary health episode of LSHTM Viral, we explore the deathly impacts of excess heat driven by global warming. Shakoor Hajat explains what actually happens to our body during heat stress and how that's causing increases in mortality and morbidity worldwide, and Ana Bonell shares a case study from her PhD research on how hot temperatures are affecting pregnant farmers - and their foetuses - in West Africa. Both researchers also explain why, despite the challenges, they are still hopeful.