Mumbai is witnessing a dip in temperatures by 4-5° C in the past 2 days, providing relief from a 2-week-long heatwave. The IMD predicts temperatures to remain around 34° C till March 19. Climatologist Rajesh Kapadia explains that Mumbai typically experiences fluctuating temperatures in March due to a combination of northerly winds and sea breezes, with 33° C being the normal March average.