Rigorous cyclone 'Nivar' would deepen into a very severe cyclonic storm and it is likely to cross the coast between Tamil Nadu and Puducherry before dawn on Thursday, the India Meteorological Department (IMD) said. Chief Minister K Palaniswami, declared Thursday a public holiday for 13 districts including Chennai, Vellore, Cuddalore, Villupuram, Nagapattinam, Tiruvarur, Chengelpet and Kancheepuram considering the safety of people in view of the cyclone. Wednesday has already been announced a holiday. In its latest bulletin, the metrological deptt said Nivar would cross over between Karaikal and Mamallapuram "during the midnight of November 25 and early hours of 26 November." The storm, 250 km off Chennai and 190 km and 180 km from Puducherry and Cuddalore respectively is very likely to move northwestwards and cross coasts as a "very severe cyclonic storm with a wind speed of 120-130 kmph gusting to 145 kmph." Under the influence of the cyclone, coastal and north interior Tamil Nadu, Puducherry and Kariakal regions are likely to receive rainfall on Wednesday at most places with heavy to very heavy showers at a few places and extremely heavy rains at isolated places. South coastal Andhra Pradesh is also likely to see showers at most places today. Rainfall is expected to continue in many places in these regions Thursday too with heavy rainfall at some places. 10th edition of National Science Film festival started virtually Cyclone Nivar: 30 teams of NDRF commanded, currently under control Cabinet Secretary holds NCMC review meeting over Cyclone Nivar