Nepal is bracing for severe weather conditions following an urgent advisory issued by the Department of Hydrology and Meteorology (DHM). Atmospheric instability triggered by a low-pressure system in the Bay of Bengal combined with late-monsoon dynamics is projected to bring intense downpours across large parts of the country.
Authorities have placed emergency response teams on alert and urged the public to minimize movement, restrict non-essential travel, and refrain from long-distance road trips.
Timeline & Regional Impact Breakdown
The rainfall activity will intensify sequentially across eastern, central, and western provinces over the coming days.
- Phase 1: Wednesday, Ashoj 7 (Early Activity) Rainfall activity will begin escalating across eastern and central Nepal. Koshi, Bagmati, and Gandaki provinces will experience light to moderate showers, turning into heavy downpours in select hill and mountain zones. The Annapurna Express+ 1
- Phase 2: Friday, Ashoj 9 to Sunday, Ashoj 11 (Peak Intensity) Weather conditions will deteriorate significantly over western and central regions. Gandaki and Lumbini provinces are projected to bear the brunt of the storm, with heavy to very heavy rainfall expected across multiple districts and localized extremely heavy rain possible at isolated locations. The Annapurna Express
- Widespread Coverage Across Other Provinces Widespread rainfall will extend into Koshi, Madhesh, Bagmati, and Sudurpaschim provinces, where many areas will face heavy to very heavy precipitation accompanied by thunder and gusty winds. Isolated heavy rainfall is also forecasted for portions of Karnali province.
| Affected Region | Expected Rainfall Severity | Key Disaster Risks |
|---|---|---|
| Gandaki & Lumbini | Heavy to Very Heavy (Extremely Heavy isolated) | Major river swells, flash floods, massive landslides |
| Koshi, Bagmati & Madhesh | Heavy to Very Heavy | Urban inundation, river overflows, debris flow |
| Sudurpaschim & Karnali | Moderate to Heavy | Hill slope instability, flash floods in local rivulets |
Secondary Hazards and Infrastructure Disruption Risks
The anticipated rainfall poses severe secondary risks across Nepal’s topographical zones:
- Landslides and Debris Flows: Hilly terrain in Bagmati, Gandaki, Karnali, and Sudurpaschim faces heightened risk of slope failures and rockfalls, threatening major highway corridors. The Annapurna Express
- Flash Flooding and Inundation: Rivers flowing through the Terai belt in Madhesh and Lumbini, alongside streams across urban hubs like the Kathmandu Valley, are expected to swell past danger thresholds.
- Transport and Air Travel Interruptions: Highway blockages due to mudslides are likely along major arterial networks. Domestic flight operations may face groundings or delays due to poor visibility and storm activity. The Annapurna Express
- Agricultural Impact: Farmers in the midst of harvesting paddy crops are at severe risk of crop damage and flooded fields. The Annapurna Express
Official Safety Guidelines & Emergency Action Steps
Authorities and disaster management agencies advise the public to adhere strictly to safety protocols:
- Avoid Non-Essential Travel: Refrain from night travel or long-distance road journeys along highway passes prone to landslides.
- Monitor River Water Levels: Residents living near major riverbanks or floodplains should pack emergency bags and identify nearby high-ground safe shelters.
- Agricultural Precautions: Farmers are instructed to delay paddy harvesting or secure harvested crops in elevated, dry storage facilities.
- Trekking and High-Altitude Caution: High-altitude mountaineering and trekking expeditions in Gandaki and Koshi should be temporarily suspended due to expected snowfall and severe weather. The Annapurna Express
For real-time flood alerts and weather updates, the public can reach official emergency services via the national toll-free hotline 1155.
Frequently Asked Questions
When is the heavy rainfall expected in Nepal?
Rainfall activity begins increasing on Wednesday, Ashoj 7 (Sept 23) across Koshi, Bagmati, and Gandaki provinces. The peak intensity will occur from Friday, Ashoj 9 to Sunday, Ashoj 11 (Sept 25–27), bringing heavy to extremely heavy downpours.
Which provinces in Nepal face the highest flood and landslide risks?
Gandaki and Lumbini provinces face the highest risk of extremely heavy rainfall. However, widespread heavy rain is also forecast for Koshi, Madhesh, Bagmati, Sudurpaschim, and parts of Karnali province.
Has the government issued travel advisories or travel restrictions?
Yes. The Department of Hydrology and Meteorology (DHM) and provincial authorities have urged citizens and tourists to avoid non-essential long-distance travel, avoid night driving along mountain highways, and delay trekking expeditions.
What are the emergency helpline numbers for flood and weather alerts in Nepal?
You can call the following official toll-free numbers for assistance and live updates:
- Flood & Weather Alert Helpline:
1155 - Disaster Emergency Assistance:
1234 - Nepal Police Emergency:
100 - Armed Police Force (APF):
1114
