From Mandi to Dehradun: 5 deadliest Himalayan monsoon tragedies of 2025

Rescue ops in the Himalayas

The 2025 monsoon season has battered the Himalayan region of India with ferocity rarely seen in recent memory. Extreme weather events, including cloudbursts, flash floods, and relentless rainfall, have left a trail of destruction across Uttarakhand, Himachal Pradesh and Jammu & Kashmir.

The five most catastrophic disasters, include those in Dehradun and Uttarkashi in Uttarakhand, Mandi in Himachal Pradesh, Kistwar flash floods in J&K and the record-breaking Jammu floods.

Dehradun deluge

The devastation in Dehradun is the latest reminder of the Himalayan region’s fragile ecology and the urgent need for resilient planning. Uttarakhand is reeling from a historic deluge, with the state capital breaking a 101-year all-time one-day September rainfall record.

The disaster has claimed at least 15 lives in Uttarakhand, 13 of them in Dehradun, which bore the brunt of the latest wave of rain-related incidents, triggering landslides, snapping vital road links, and causing widespread destruction across the region.

Fierce downpours also led to sudden swelling of the Tamsa and Tons rivers, flooding hundreds of homes and businesses. Bridges connecting Dehradun to Mussoorie and Rishikesh collapsed, cutting off thousands of tourists and locals from essential transport.

Mandi horror in Himachal Pradesh

Mandi district in Himachal Pradesh witnessed nature’s fury through successive cloudbursts, landslides, and flash floods in the month of July and again on September 16, the Son Khad River in Dharampur swelled overnight, flooding the bus stand, submerging dozens of vehicles, and destroying hundreds of homes.

In Nihri, a sudden house collapse claimed three lives, and many residents narrowly escaped with only the clothes on their backs. Over 500 homes were destroyed, and a student hostel in Dharampur had to be urgently evacuated, The Times of India reported.

Kistwar flash floods in J&K

A cloudburst struck Chisoti, the last motorable village en route the Machail Mata temple, on August 14, leaving over 60 dead and 100 injured.

The flash floods triggered by the cloudburst left a trail of destruction, flattening a makeshift market, a langar (community kitchen) site for the Machail Mata Yatra, damaging 16 houses and government buildings, three temples, four water mills, a 30-metre-long bridge, and more than a dozen vehicles.

Dharali’s tragedy in Uttarkashi

A sudden flash flood caused by a cloudburst in the Kheer Ganga River catchment area swept away houses, shops and roads, leaving a trail of destruction on August 5. Two cloudburst incidents were reported, one in Dharali and another in the Sukhi Top area, resulting in widespread destruction.

More than 50 people were reported missing, several hotels and homes were erased from the map, and the Harsil Army camp was partially swept away. Eyewitnesses described terrifying waves of boulders and mud crushing everything in their path, with the Char Dham pilgrim route disrupted and rescue teams working round the clock.

Jammu floods and landslides

Jammu and its adjoining Himalayan districts were battered by persistent monsoon rains, provoking flash floods and deadly landslides. Rural areas faced widespread loss of lives, homes and farmland.

Since August 14, cloudbursts, landslides, and flash floods in Kishtwar, Kathua, Reasi, and Ramban districts have killed over 130 people, mostly pilgrims, injured more than 120, and left 33 untraced, The Times of India reported.