A record-breaking heatwave is sweeping South Asia, pushing temperatures to dangerous highs and disrupting daily life for hundreds of millions. This crisis is exposing deep inequalities across the region, with vulnerable populations bearing the greatest burden. As governments scramble to respond, the question remains: What is causing this heatwave so early in the year?
India, Pakistan, and Bangladesh are experiencing unusually early and intense heatwaves, with temperatures soaring above seasonal averages. The intensity, duration, and geographic spread of these heat events are unprecedented, according to scientists and meteorological agencies. This extreme weather is linked to human-driven climate change, which is causing disruptions in natural weather patterns.
In India, high-pressure systems are trapping hot air near the surface, preventing it from rising and cooling. Weak pre-monsoon rains and lingering El Nino-like patterns are further suppressing cooling. El Nino, a climate pattern characterized by warmer-than-usual sea surface temperatures in the eastern Pacific Ocean, is expected to intensify in the coming months, according to the World Meteorological Organization. This could worsen the impact of the heatwave.
The heatwave is affecting people across multiple pathways, with the elderly, pregnant women, young children, and those with pre-existing conditions facing the greatest risk. Low-income laborers are also more likely to be exposed to heat stress due to poorly insulated and ill-ventilated homes. In India, roughly 380 million people, about three-fourths of the workforce, are engaged in heat-exposed labor, leading to lost working hours and wages.
Governments are implementing heat action plans, but these efforts are falling short of protecting the most vulnerable populations. India's heat preparedness model, for example, tends to reach those already within formal systems, leaving informal workers and daily-wagers unprotected. Addressing the crisis requires a broader structural response that spans every level of government and its domains, including housing, urban planning, health systems, labor protections, and disaster management.
In Pakistan, there are concerns about the country's preparedness and transparency in the face of intensifying heatwaves. Historical discrepancies between official figures and on-the-ground reality have been cited, suggesting that authorities may be downplaying the crisis to avoid political fallout. However, acknowledging the scale of loss and damage is critical to mobilizing public awareness and accessing international climate funds.
Climate models project that the frequency and intensity of extreme heat events will increase across South Asia over the coming decades, even under moderate emissions scenarios. While India has warmed more slowly than the global average in recent decades, this is partly due to temporary cooling effects from aerosol pollution and widespread irrigation. As these effects weaken, warming could accelerate beyond historical trends.
However, rising temperatures do not necessarily mean rising harm if the correct measures are implemented. Good adaptation planning, anticipatory action, and early warning systems can substantially reduce damage even as temperatures rise. The goal is to decouple the trend in heat from the trend in suffering.
