Delhi recorded its warmest May night in 14 years on May 22, 2026 [1], as an intensifying heatwave gripped the region [2].
High nighttime temperatures prevent the urban environment from cooling down, increasing the risk of heat-related illnesses and straining the city's power grid. This lack of nocturnal relief compounds the physical stress on residents during an already severe heatwave.
The India Meteorological Department (IMD) reported that the minimum temperature at Safdarjung reached 31.9 °C [2]. This mark represents the highest minimum temperature for the month of May in 14 years [1].
In response to these conditions, the IMD has issued an orange alert that remains valid until May 27, 2026 [1]. The alert indicates that weather conditions are likely to be disruptive, requiring residents to take precautions against extreme heat.
The heatwave is part of a broader pattern of extreme weather affecting North India. These conditions have led to unusually high nighttime temperatures across the National Capital Region, a trend that complicates efforts to manage public health during the peak of summer.
Local authorities continue to monitor the situation as the city faces sustained high temperatures. The IMD said the orange alert will remain in place to warn the population of continued heat risks through the end of the month [1].
“Delhi recorded its warmest May night in 14 years”
The recording of a 14-year high for nighttime temperatures suggests a breakdown in the typical diurnal cooling cycle. When minimum temperatures remain high, the human body cannot recover from daytime heat stress, which typically leads to an increase in heatstroke cases and higher mortality rates among vulnerable populations. This trend aligns with broader patterns of urban heat islands where concrete and asphalt retain heat long after sunset.
