Extreme heat can have substantial consequences for human health, especially when paired with humidity Di Napoli et al., 2019;Foster et al., 2021). The majority of heat dissipation necessary for human thermoregulation occurs through evaporative cooling via sweating (Gagnon & Crandall, 2018), rendering extreme humid heat more physiologically stressful than extreme temperature alone (Vanos & Grundstein, 2020). Humid heat extremes are rapidly increasing in frequency (Raymond et al., 2020;Rogers et al., 2021), and are projected to continue to intensify in the warming climate (Coffel et al., 2018), significantly increasing exposure to dangerous levels of humid heat.Various indices are used to quantify the combined impact of temperature and humidity. Wet-bulb temperature (TW) is a particularly useful metric, as it establishes a maximum tolerable intensity of humid heat at about 35°C (Sherwood & Huber, 2010). This survivability limit applies to healthy individuals under optimal external conditions (e.g., in full shade, with access to unlimited drinking water) (Raymond et al., 2020;Sherwood & Huber, 2010). Thus, substantial health effects-including mortality-occur at far lower TW values Raymond et al., 2020;Vecellio et al., 2022). Even less extreme magnitudes of humid heat can cause a variety of societal impacts, such as decreased economic productivity associated with limitations on outdoor labor or increased energy demand due to the need for artificial cooling (e.g.