There was slight relief for Delhi'ites on Sunday after reeling under the longest cold spell of the last 22 years due to a change in wind direction, the Met department said, “As expected, change in wind direction from north-westerly to easterly has started and reduction in cold day and cold wave started from today (Sunday). This is reflected in maximum and minimum temperature.” The frigid temperatures, high humidity and low wind speed allowed accumulation of pollutants leading further deterioration in the national capital's air quality on Sunday. The overall air quality index stood at 437 at 4 pm.
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