By 2050, nearly every child will face more frequent heatwaves — threatening their health, disrupting their education, and putting their future at risk. Heat does not affect all children equally. Cruelly, and like so many climate impacts, it will be those with the fewest resources who will be worst affected. Heat could therefore further stratify classrooms and communities along economic, gender, and disability lines. At the micro level, children who have access – either financially or geographically – to schools with climate control could have more schooling, be better able to focus, and ultimately secure better learning outcomes. This is as true in Lusaka as it is in London. But it is also not an inevitability. If the global community is serious about realizing every child’s right to learn, it is time to move heat from a climate issue to an education issue.