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The Pakistan Meteorological Department (PMD) has predicted that today the mercury in the metropolis will go as high as 42 degrees Celsius.
According to the PMD, as the sea breeze towards the city had been cut off, the port city was under the influence of a high-pressure region over Central Asia.
The Pakistan Medical Association and other medical organizations advised people to be alert and cautious, urging them to avoid going out in the heat from 11 a.m. to 4 p.m.
The temperature remained 37.7 degrees Celsius on Tuesday in the city but due to very low relative humidity, although the feel-like temperature was not as high as the real temperature due to very low relative humidity, officials said.
They said that during the next three to four days, they were expecting dry conditions in the city.
In the meantime, Iftikhar Ali Shallwani, the Karachi Administrator, issued instructions to alert all Karachi Metropolitan Corporation hospitals and 1122 emergency services.
All relevant officials and personnel were ordered to be on duty round the clock. The focus of all hospitals was directed to make foolproof arrangements in the wake of the heatwave alert, according to a press statement released by the KMC.