Cyclone Arnab Aftermath: Odisha Floods
Why in News?
- Floods caused by Cyclone Arnab continued in southern Odisha on 29 October 2026, a day after the storm struck, Down To Earth reported.
- Patrapur block in Ganjam district recorded 546 mm of rain between 11 am and 7 pm on 28 October, and more than 62,500 people were affected in Ganjam and Gajapati districts.
- Over 29,000 people were evacuated and 2,328 remained stranded in 70 Ganjam villages, with rail and road links disrupted.
Key Terminologies
- Cyclone Arnab
- A tropical cyclone that struck the Andhra Pradesh-Yanam coast on 28 October 2026 and later weakened into a depression. Its heavy rain then caused floods in southern Odisha.
- Rushukulya River
- A river in southern Odisha that flows through Ganjam district into the Bay of Bengal. It breached an embankment at Purushottampur during the floods.
- Embankment Breach
- A failure in a raised earthen bank built along a river or coast to hold water back. A breach lets floodwater spill into villages and fields.
- ODRAF
- The Odisha Disaster Rapid Action Force, the state's own rescue force. It works with the National Disaster Response Force (NDRF) and fire services in floods.
- Orographic Rainfall
- Rain caused when moist air is forced to rise over hills or mountains. The Narmada…">Eastern Ghats in southern Odisha can raise rainfall when a cyclone's moist winds meet them.
Key Issues
- Extreme Rainfall: Patrapur block received 546 mm in eight hours, from 11 am to 7 pm on 28 October, and Chikiti received 289 mm. Such totals exceed what rivers and drains are built to carry.
- River and Embankment Failure: The Rushukulya breached an embankment at Purushottampur, the Bahuda river flooded low-lying areas, and coastal mud embankments gave way on 28 October. The failures widened the flooded area.
- Reservoir Release: Discharge from the Baghalati reservoir reached 550 cubic metres per second by 11 am on 28 October, with water released through four gates, which added to the flow downstream.
- Cut-off Villages: 299 villages in 22 Ganjam blocks and 711 villages in seven Gajapati blocks were affected, and 2,328 people were stranded in 70 Ganjam villages, which made rescue slow.
- Infrastructure Disruption: Rail services were disrupted near bridge number 1052 between Ichchapuram and Jatpura stations in Andhra Pradesh, and a landslide at Taptapani in Ganjam disrupted traffic on 29 October.
Key Implications
Positive/Pros/Merits
- Early Evacuation: About 29,323 people were moved to safety, 11,882 in Ganjam and 17,441 in Gajapati, which reduced risk to life.
- Care for Vulnerable Groups: 550 pregnant women in Ganjam and 420 in Gajapati were shifted to safer locations.
- Strong Rescue Presence: Ganjam had 27 ODRAF, 3 NDRF and 24 fire service teams, and Gajapati had 12 ODRAF, 1 NDRF and 12 fire service teams.
- Central Support: Union Home Minister Amit Shah assured the state of central assistance, according to the report.
Negative/Cons/Demerits
- Scale of Impact: Over 62,500 people were affected, about 42,500 in Ganjam and 20,000 in Gajapati, and the number may change as waters recede.
- Access Problems: A boulder fell on the Kalinga Ghat road near Andharikot in Kandhamal, and power poles fell in several places, which hindered relief and restoration.
- Pending Air Rescue: The Indian Coast Guard helicopters were discussed for inaccessible areas, but the decision was still pending in the report.
- Data Differences: The report gives the affected population as 62,000 in one place and over 62,500 in another, so final figures must be confirmed with the state government.
Key Initiatives
- Evacuation: Odisha evacuated 11,882 people in Ganjam and 17,441 in Gajapati, a total of 29,323, and moved pregnant women to safer places.
- Rescue Teams: Ganjam has 27 ODRAF, 3 NDRF and 24 fire service teams, and Gajapati has 12 ODRAF, 1 NDRF and 12 fire service teams.
- Reservoir Management: Water from the Baghalati reservoir was released through four gates, with discharge reaching 550 cubic metres per second on 28 October.
- Central Assistance: Union Home Minister Amit Shah assured Odisha of central support after the floods.
The state government is leading rescue and relief, with central teams and assurances of support. The India Meteorological Department says the cyclone has weakened into a depression, and officials expected water levels to recede within hours, according to local reports. Damage assessment and relief figures are yet to be finalised.
Director's Perspective
Way Forward
- Strengthen coastal and river embankments in the Rushukulya and Bahuda basins, with regular checks before the monsoon and cyclone seasons.
- Link reservoir releases with rainfall forecasts and give downstream villages early warning of discharge.
- Map flood-prone blocks in Ganjam and Gajapati and pre-position boats, food and medical supplies.
- Keep roads, rail and power resilient in hilly stretches prone to landslides, such as Taptapani and Kalinga Ghat.
- Publish verified damage and relief figures so that assistance can be planned.
Cyclone Arnab shows that the danger of a cyclone does not end at landfall. Extreme rain, embankment breaches and reservoir releases flooded southern Odisha a day after the storm struck. Early evacuation saved lives, but cut-off villages and broken links slowed relief. In a Mains answer, explain how cyclones weaken yet bring heavy rain inland, link the Eastern Ghats and river basins to flood risk, and recommend stronger embankments, early warning and resilient infrastructure.
GS Relevance
Frequently Asked Questions
What caused the floods in southern Odisha in October 2026?
Heavy rain from Cyclone Arnab, which struck the Andhra Pradesh-Yanam coast on 28 October 2026 and later weakened, caused the floods. Patrapur block in Ganjam recorded 546 mm in eight hours, and embankment breaches on the Rushukulya and coast widened the flooded area.
How many people were affected by the Odisha floods?
Down To Earth reported that more than 62,500 people were affected, about 42,500 in Ganjam and 20,000 in Gajapati districts. Around 29,323 people were evacuated, and 2,328 remained stranded in 70 Ganjam villages, though the figures may change as relief work continues.
Which rescue forces worked in the flood-hit districts?
Ganjam had 27 ODRAF teams, 3 NDRF teams and 24 fire service teams, and Gajapati had 12 ODRAF teams, 1 NDRF team and 12 fire service teams. The Indian Coast Guard helicopters were discussed for inaccessible areas, with a decision pending.
Why can a weakened cyclone still cause floods?
A cyclone loses wind strength after landfall because it is cut off from warm sea water, but it still carries large amounts of moisture. When this moisture meets hills such as the Eastern Ghats, it can fall as very heavy rain, which swells rivers and breaks embankments.
PYQ Practice — Statement Analysis
1 Cyclone Arnab made landfall on the Andhra Pradesh-Yanam coast on 28 October 2026.
Its heavy rain then caused floods in southern Odisha, including Ganjam and Gajapati districts.
2 The Rushukulya river flows through Ganjam district of Odisha.
It breached an embankment at Purushottampur during the floods.
3 ODRAF is a national force under the Union Ministry of Home Affairs.
The Odisha Disaster Rapid Action Force is the state's own rescue force.