Wet bulb temperature is a combined metric of air temperature and humidity, strengthening its
measurement and prediction of heat stress compared to temperature alone. Extreme wet
bulb temperatures are thus multivariate extremes with direct societal implications, and
understanding what controls their occurrence is critical to preparing for the associated
negative human health and socioeconomic impacts. Previous literature has suggested that
the most extreme humid heat events in South Asia take place during the pre-monsoon …