The rising demand for air conditioning during heatwaves poses a dual threat: overburdened power grids and increased urban heat due to waste heat from air conditioners. This creates a feedback loop, exacerbating the very heatwaves that drive demand. Vulnerable populations, such as the elderly and those without access to cooling, face heightened risks of heat-related illnesses and fatalities. The strain on power systems could lead to blackouts, leaving millions without cooling during critical periods.