Aapda mitra, Automatic rain gauges, Automatic weather stations, Calamity, Climate change, Community based disaster preparedness, Disaster damages, Disaster management, Disaster prevention, Disaster risk reduction, District emergency operation centre, Doppler radar observations, Early warning systems, Early warning systems for disaster management, Evacuation strategy, Global warming, Landslide detection sensor network, Managing seismic and landslide risks, Medical preparedness, Mitigation and preparedness, Reducing the risk of urban flooding in Chennai, Relief response, Seismic observation network, State disaster management cell, State disaster risk management fund, State emergency operation centre, Tamil Nadu disaster risk reduction agency, TN policy, TNSMART, Urban flooding, Weather balloons lightning detection network