 The study found that the unprecedented number of heat-associated deaths in Maricopa County, Arizona, USA during summer 2016 was not related to observed meteorological conditions, suggesting that non-meteorological factors were responsible for the surge in deaths. This highlights the importance of considering non-meteorological drivers when studying the health burden associated with heat and preparing for heat events. This article was offered by Hannah Putnam, David M. Hondula, Ale Urban, and others.