Karachi Gripped by Severe Heatwave as Temperatures Soar

Karachi is enduring a severe heatwave with temperatures significantly above seasonal averages, placing millions of residents under acute heat stress and raising urgent concerns about public health, electricity grid stability, and water availability in Pakistan's largest urban centre. Meteorological authorities have issued heat alerts as conditions are forecast to persist for several days.

The heatwave arrives in May, a month during which Karachi historically experiences its first major temperature spike of the pre-monsoon season. However, the severity of this event has exceeded typical parameters, with heat indices in exposed areas presenting conditions dangerous for the elderly, outdoor workers, and those without access to cooling. Health facilities have been placed on standby for heat-related admissions.

Electricity demand has surged as air conditioning and cooling loads increase across residential, commercial, and industrial users. Power distribution companies serving Karachi face maximum pressure to maintain supply, with load management an acute challenge. Previous heatwave episodes have been accompanied by prolonged power outages that amplify health risks for vulnerable populations.

Water supply constraints, already a chronic issue in the city, become acutely dangerous during heatwaves when hydration demand rises sharply. Civil society and health practitioners have urged authorities to establish emergency cooling centres, increase water supply to underserved areas, and issue clear public guidance on heat safety protocols.

Climate scientists have noted that extreme heat events in Karachi are becoming more frequent and more intense, consistent with regional climate change projections. The city's dense urban form, limited tree cover, and widespread use of heat-absorbing building materials amplify the urban heat island effect.