Cyclone Arnab: Bay of Bengal Warning and Evacuations Along the Eastern Coast
Context
The India Meteorological Department (IMD) warned that Cyclone Arnab was intensifying towards the Andhra Pradesh coast, with severe weather forecast for 28 October. Andhra Pradesh and Odisha prepared shelters, emergency response teams and evacuation measures ahead of the anticipated impact.
Key Highlights
- The reports forecast landfall near Yanam, Kakinada as a very severe cyclonic storm, accompanied by strong winds and heavy rainfall. This remained a forecast as of 27 October.
- The IMD issued red alerts for several districts in Andhra Pradesh and highlighted the risks of flooding and strong winds.
- Odisha prepared more than 1,700 shelters and deployed disaster response personnel.
- Special evacuation plans covered pregnant women, coastal settlements and other vulnerable residents.
Key Concepts
- Tropical Cyclone: A rotating, warm core low pressure system that develops over tropical seas and derives energy from oceanic heat and moisture.
- Very Severe Cyclonic Storm: An IMD classification for cyclonic systems with maximum sustained surface wind speeds of 118 – 166 km/h.
- Storm Surge: An abnormal rise in sea level caused by cyclone winds and atmospheric pressure. It can combine with tides to inundate low lying areas.
- India Meteorological Department (IMD): The agency responsible for issuing cyclone, rainfall and severe weather forecasts and warnings.
- National Disaster Response Force (NDRF) and State Disaster Response Force (SDRF): National and State level forces responsible for specialised emergency response under the disaster management framework.
- Risk Based Warning: An approach that considers hazard intensity, exposure, vulnerability and actionable local measures instead of relying solely on wind speed.
Way Forward
- Complete forecast based preventive evacuations and strengthen last mile warning systems.
- Keep backup arrangements for electricity, drinking water systems, hospitals and communication networks ready.
- Improve risk mapping, strengthen coastal ecosystem buffers and promote flood resilient housing.