In June 2015, Karachi witnessed one of the worst heat waves in recorded history — temperatures rose to 43.7oC killing more than 1,500 people in just five days. However, experts fear that this year’s heat wave may be even worse than the last. Met officials predict that the metropolis will witness two to three heat waves in May, June, and July — where temperatures may reach 44 to 45oC (and shall feel like 50oC).
It won’t just be the port city that shall be at risk, but also the plains in north Sindh and south Punjab (Sukkur, Ghotki, Jacobabad and Multan, etc). According to a March 2016 report issued by the National Weather Forecasting Centre, a subsidiary of Pakistan Meteorological Department, the “second half of May and the first half of June is likely to remain drier and hotter than normal [and will] increase the probability of occurrence of heat waves over the plains and the coastal belt of the country”.
Pakistan has faced severe flooding, droughts, and heat waves over the past five years, and experts point out that this trend, due to climate change, is set to continue. The think-tank, Germanwatch, ranks Pakistan as one of the 10 countries most-affected by climate change, on the basis of vulnerability to global warming from 1994 to 2013, on its 2015 Global Climate Risk Index.
A combination of climate change, and the El Nino effect means that Karachiites shall be at the receiving end of multiple heat waves. Are contingency plans drawn up by the non-profits and the government enough to mitigate this crisis?
However, other factors, such as weather patterns and the layout of the city, could make the heat wave more intense. Dr Pervaiz Amir, a well-known environmentalist, points out that the El Nino effect (a natural weather phenomenon that influences the monsoons and sea temperatures), the ‘island effect’, and the tendency of Karachiites to burn trash outdoors and in the streets, could be the contributing factors.
A recent study at the Aga Khan University (AKU) highlights how the ‘island effect’ can make the city’s residents more vulnerable to the impact of a heat wave: high population density, small living spaces, and buildings constructed close together, tend to trap the heat generated by sunlight, vehicles and factories, etc.