According to sources the Indian Meteorological Department (IMD) has issued a heat wave warning for isolated places in Tamilnadu till Wednesday. In a weather bulletin released on Monday, the IMD said, “Heat wave conditions are likely to prevail over isolated places of Tamilnadu.” Meanwhile the warning comes on a day when a lot of places across Tamilnadu recorded day temperatures of over 40 degree Celsius.
Furthermore Thiruthani recorded the highest temperature of 43.5 degree Celsius on Wednesday while Karur Paramathi recorded a temperature of 42 degrees. Trichy (41.9), Chennai Airport (41.2) and Vellore (41.1) also recorded high temperatures through Monday. Meanwhile Madurai, Palayamkottai and Salem also sizzled on Monday with temperatures of 40.8, 40.5 and 40.5 degree Celsius respectively.
Moreover the coastal areas in Tamilnadu recorded sub-40 degree temperatures through Monday with Chennai (Nungambakkam) witnessing a temperature of 38.6 degree Celsius. Cuddalore (36), Kanyakumari (32.9), Nagapattinam (38.2), Pamban (34) and Thoothukudi (34) all recorded lower temperatures than interior Tamilnadu. Hence according to the criteria set by the IMD, a heat wave is declared when the maximum temperature of a station reaches at least 40 degree Celsius in the plains, 37 degree Celsius in coastal regions and at least 30 degree Celsius in hilly regions.
