The Nagaland State Disaster Management Authority (NSDMA) has forecast a fresh spike in rainfall activity across the state from August 26 through August 29, with thunderstorms, lightning and moderate rain expected to intensify across multiple districts. The advisory comes just weeks after a devastating cloudburst-triggered landslide in Mon district killed nine people and injured five, and after repeated landslides cut off the vital Kohima-Dimapur highway earlier this monsoon season — making this week's forecast a fresh test for a state already worn down by an unusually erratic 2026 monsoon.
Background
Nagaland's 2026 monsoon has swung between extremes. Earlier in the year, the state recorded a significant rainfall deficit — from January to February 2026, Nagaland received just 1.9 mm of rainfall against a normal of 32.5 mm, a 94 percent departure from normal, and five districts recorded no rain at all during parts of the year even as the India Meteorological Department had forecast a broadly normal monsoon for the wider Northeast region. That dry stretch gave way abruptly to intense, damaging rainfall once the monsoon proper set in, echoing a pattern seen across India in 2026, where the season swung between floods and dry spells and left the country with an overall rainfall deficit even as individual states and districts absorbed severe, concentrated downpours.
The most serious single event of Nagaland's 2026 monsoon came on July 19, when a cloudburst triggered a landslide in Mon Town at around 6:30 am, after the NSDMA and IMD had issued Red and Orange weather alerts across the state from the evening of July 18. Mon district recorded 137 mm of rainfall in the lead-up to the disaster. The landslide killed nine people and injured five, prompting Chief Minister Neiphiu Rio to announce Rs 4 lakh ex-gratia compensation to the next of kin of each deceased victim and Rs 74,000 to each injured person, while the state government released Rs 70 lakh in immediate relief from the State Disaster Response Fund and a further Rs 10 lakh grant to support civil society organisations, the district hospital and volunteers involved in search and rescue.
Key Details
This week's advisory is more localised than the state-wide red alerts issued in July, but still covers a wide swathe of Nagaland's eastern and central districts.
- August 26 forecast: Thunderstorms, lightning and light-to-moderate rain likely over Longleng, Mokokchung, Peren, Phek, Tseminyu, Tuensang and Wokha districts.
- August 27 forecast: Rainfall activity expected to become more widespread, with light-to-moderate rain likely at most places in Longleng, Peren, Tseminyu and Tuensang.
- Expected accumulation (5-day cumulative): Peren is forecast to receive the highest rainfall at 93.83 mm, followed by Mokokchung at 88.83 mm and Longleng at 83.98 mm.
- Public advisory: NSDMA has urged residents to avoid sheltering under isolated trees or near electric poles during thunderstorms, and to exercise caution while travelling in reduced visibility on landslide-prone stretches.
The forecast follows weeks in which several districts already sustained significant infrastructure damage from monsoon rains. In Chumoukedima district, waterlogging was reported in Ward-9, roads and a culvert were damaged at multiple locations, and the Khughovi Bridge over the Chathe River was closed to traffic after the river rose to a dangerous level. In Meluri district, overflowing water inundated paddy fields and washed away hanging bridges at Tetsho and Jijirii villages. Landslides and mudslides were also reported from Phek and Noklak districts, with restoration work ongoing. Separately, heavy rain triggered a landslide along National Highway-29 near the old Kohima Municipal Council dumping site, completely blocking the Kohima-Dimapur road — one of the state's most critical transport corridors — and stranding hundreds of commuters in long traffic queues on both sides of the blockage for hours before debris could be cleared.
In response to the cumulative damage, the NSDMA has directed all District Disaster Management Authorities (DDMAs) to remain vigilant and activate their respective District Emergency Operations Centres, prioritising the evacuation of residents from severely waterlogged, low-lying and landslide-prone areas, including unstable embankments and riverbanks.
At a Glance
| Event | Date | Impact |
|---|---|---|
| Mon Town cloudburst landslide | July 19, 2026 | 9 dead, 5 injured; Rs 70 lakh SDRF relief released |
| Kohima-Dimapur (NH-29) landslide | Earlier in monsoon season | Highway completely blocked; hundreds of commuters stranded for hours |
| Chumoukedima / Meluri / Phek / Noklak damage | Ongoing through monsoon | Bridges washed away, roads and culverts damaged, paddy fields inundated |
| Current NSDMA alert | August 26–29, 2026 | Peren, Mokokchung, Longleng forecast for highest rainfall (83–94 mm cumulative) |
Local Impact
For residents of the districts named in this week's alert, the immediate concern is road safety and access — the Kohima-Dimapur blockage earlier this season demonstrated how quickly a single landslide on Nagaland's limited highway network can cut off a state capital from its main commercial hub, disrupting the movement of goods, patients needing medical referral, and daily commuters. In rural districts like Meluri and Phek, washed-out hanging bridges and damaged culverts directly threaten village-to-village connectivity that many communities rely on for market access and schooling, while inundated paddy fields raise the prospect of crop losses for farming households already contending with an erratic rainfall year.
The Mon district landslide has also sharpened public attention on the risks facing communities in hilly terrain during cloudburst-type extreme rainfall events, which can strike with little warning even when a broader alert has been issued. The state government's relief response — ex-gratia payments, SDRF disbursement and support for local hospitals and volunteers — sets a template that district authorities are likely to draw on again if this week's forecast rainfall triggers fresh landslides or flash floods.
What Happens Next
With DDMAs across the state now directed to keep Emergency Operations Centres active, district authorities in Peren, Mokokchung, Longleng, Phek, Tseminyu, Tuensang and Wokha are expected to monitor river levels, slope stability and waterlogging over the coming days and pre-position evacuation resources in known vulnerable pockets. NSDMA is likely to continue issuing rolling advisories through the remainder of the monsoon season, given the pattern seen so far in 2026 of alerts being followed by localized but serious damage. Whether this particular spell brings landslides on the scale of the Mon or Kohima-Dimapur incidents will depend on how the forecast rainfall totals materialise on the ground over the next several days.
Frequently Asked Questions
Which Nagaland districts are under the current rainfall alert?
The NSDMA's August 26-29 advisory covers Longleng, Mokokchung, Peren, Phek, Tseminyu, Tuensang and Wokha, with Peren, Mokokchung and Longleng forecast to receive the highest cumulative rainfall.
How much rain is expected?
NSDMA's five-day cumulative forecast puts Peren at 93.83 mm, Mokokchung at 88.83 mm and Longleng at 83.98 mm, with thunderstorms and lightning also expected across the region.
What happened in the Mon district landslide?
A cloudburst-triggered landslide struck Mon Town on July 19, 2026, killing nine people and injuring five, after Red and Orange weather alerts had been issued for the state. The government released Rs 70 lakh in SDRF relief and announced ex-gratia payments to affected families.
Has this monsoon disrupted transport in Nagaland?
Yes. A landslide on National Highway-29 near Kohima completely blocked the Kohima-Dimapur road, one of the state's most heavily used transport corridors, stranding hundreds of commuters for hours before the debris was cleared.
What safety advice has NSDMA issued?
Residents are advised to avoid sheltering under isolated trees or near electric poles during thunderstorms, exercise caution while travelling in poor visibility, and avoid vulnerable slopes, riverbanks and landslide-prone areas.
What other districts have reported monsoon damage this year?
Chumoukedima has reported waterlogging and bridge closures, Meluri has seen inundated paddy fields and washed-out hanging bridges, and Phek and Noklak have reported landslides and mudslides disrupting connectivity.
Why has Nagaland's 2026 monsoon been so unpredictable?
The state saw a severe early-year rainfall deficit — as low as 1.9 mm against a normal of 32.5 mm in some months — before swinging into intense, damaging rainfall once the monsoon proper arrived, mirroring a broader erratic pattern seen across India's 2026 monsoon season.
Sources
- Morung Express
- Nagaland Post
- Eastern Mirror Nagaland
- Down To Earth
- ANI