Karachi is currently grappling with a relentless heatwave, having recently recorded a staggering temperature of 44.1°C, the highest since 2018. This extreme weather phenomenon is emblematic of a broader climatic crisis affecting millions across South Asia, particularly in Pakistan and India, where soaring temperatures have become distressingly common.
A Heatwave Without Precedent
The ongoing heatwave has subjected residents of southern Pakistan to sweltering conditions, with temperatures frequently exceeding 44°C to 46°C throughout April and May. This extreme weather has forced many, particularly outdoor workers and vulnerable communities, to seek refuge indoors during the hottest parts of the day. In India, similar conditions prevail, especially in regions such as Rajasthan, Gujarat, and Maharashtra, where temperatures have also soared past 45°C. As a result, state authorities have issued multiple heatwave alerts, highlighting the associated health risks and the strain on essential services.
In Karachi, typically moderated by breezes from the Arabian Sea, the extreme heat has taken a particularly harsh toll. The Pakistan Meteorological Department (PMD) reported that the city has experienced temperatures above 40°C on numerous occasions, culminating in the recent high of 44.1°C. Meteorologists caution that this may not be the last of the intense heat, with hotter days anticipated in the near future.
The Human Cost of Extreme Temperatures
The repercussions of this relentless heat are being felt acutely, especially in Karachi’s coastal areas, where electricity outages and water shortages exacerbate the situation. In Ibrahim Hyderi, one of the city’s major fishing communities, the struggle for survival has intensified. Abdul Sattar, a seasoned fisherman, recounted a distressing incident where a colleague collapsed due to heat exhaustion, underscoring the grave health risks posed by such extreme conditions.
The memories of the catastrophic 2015 heatwave, which claimed countless lives in Karachi, haunt the community. Tragically, the summer of 2024 saw a resurgence of heat-related deaths, underscoring the city’s vulnerability to extreme weather phenomena. Local healthcare facilities are increasingly overwhelmed; Dr. Suresh Kumar, who oversees the children’s ward at a government hospital in Ibrahim Hyderi, noted a startling rise in outpatient visits, with daily cases soaring from around 50 to over 200. The majority of these patients present with heat-related illnesses, including dehydration and stomach infections.
Climate Change: The Unseen Catalyst
Experts are increasingly viewing these rising temperatures as not merely isolated incidents but as part of a troubling long-term trend exacerbated by climate change and rapid urbanisation. The World Weather Attribution group has assessed the current heatwave and concluded that human-induced climate change has significantly increased the likelihood of such extreme temperature events. They assert that similar conditions would have been approximately 1°C cooler in a pre-industrial climate.
Yasir Darya, the founder of the Climate Action Center, emphasised that the high humidity in Karachi often makes temperatures feel even hotter. He noted that unusually warm nights, once rare, are now becoming commonplace, impacting sleep and overall health. The lack of adequate cooling centres and public infrastructure for heat relief further compounds the problem, as does the city’s diminishing tree cover, which intensifies the urban heat effect.
According to the PMD, average regional temperatures have surged by around 1.4°C, while Sindh province has seen a rise of approximately 1.7°C in recent decades. The implications are dire: winters are shortening, summers are lengthening, and extreme weather events are becoming more unpredictable.
Urgent Action Required
Given the alarming situation, climate specialists are calling for immediate and concerted efforts to address the crisis. Recommendations include the establishment of public cooling centres, improving access to safe drinking water, enhancing emergency medical preparedness, and initiating large-scale urban tree planting initiatives.
For the inhabitants of Sindh and other affected regions, the current climate crisis is not a distant threat; it manifests daily, transforming seasonal heat into an ongoing struggle for survival.
Why it Matters
The escalating temperatures in Karachi and across South Asia illustrate the urgent need for systemic change in how we address climate-related health risks. As extreme heat becomes a permanent fixture in the lives of millions, the intersection of public health, infrastructure, and climate policy must be reconsidered. Without decisive action, the ongoing climate crisis will continue to exacerbate health disparities and threaten the well-being of vulnerable populations, highlighting the critical importance of prioritising both environmental sustainability and public health resilience.
