In Ahmedabad, India, residents like Sapnaben Chunara face extreme heat, often exceeding 40 degrees Celsius, which has become the new normal. Chunara participates in a study using smartwatches to monitor health impacts of heat in her low-income neighborhood, Vanzara Vas. Researchers are testing reflective roofs to mitigate indoor temperatures. The study is part of a global effort to understand heat effects on vulnerable communities, with findings aimed at improving living conditions and informing policy. The increasing heat poses significant health risks, particularly for the poor.