Monsoon Rains Flood Islamabad and Rawalpindi as Nullah Lai Reaches Dangerous Levels.

ISLAMABAD/RAWALPINDI — September 1, 2026:

Intense monsoon rainfall triggered widespread urban flooding across Islamabad and Rawalpindi on Tuesday, disrupting traffic, inundating low-lying areas and forcing authorities to launch emergency measures across the twin cities.

Several major roads were affected by accumulated rainwater, while vehicles became stranded in flooded sections. The Islamabad Expressway and other important routes experienced severe traffic disruption as authorities worked to keep roads accessible.

Nullah Lai water level rises

One of the biggest concerns emerged in Rawalpindi as water levels in Nullah Lai climbed rapidly following heavy rainfall in its catchment areas.

Officials reported water levels reaching around 29 feet at Kattarian and 23.5 feet at Gawalmandi, prompting warnings and precautionary evacuation measures for communities located close to the drainage channel.

The heavy rainfall also affected several residential and commercial areas. In Islamabad's E-11 sector, overflowing drainage channels sent water onto roads and into some basements. I-8 also experienced significant water accumulation, affecting businesses and movement in the area.

Schools closed as emergency response intensifies

With flooding becoming a serious concern, authorities placed emergency and civic departments on alert. Educational institutions in Rawalpindi were closed as a precaution, while residents in vulnerable areas were advised to avoid unnecessary travel and move away from waterways and low-lying locations.

Dewatering teams, pumps and other machinery were deployed in affected parts of Islamabad and Rawalpindi to remove accumulated rainwater and restore traffic movement. Emergency services continued monitoring areas considered vulnerable to further flooding.

Rawal Dam reaches critical level

Heavy rainfall also pushed the water level of Rawal Dam close to its maximum storage level. Authorities reported a level of 1,751.90 feet and opened the spillways to regulate the rising water. Rescue services, police and other departments were placed on alert during the operation.

Officials urged citizens to stay away from streams, drainage channels and other low-lying areas while water-management operations continued.

Questions over urban planning

The latest flooding has once again renewed public debate over drainage capacity, urban development and construction around natural waterways. Residents and commentators have questioned whether rapid development and blocked drainage routes are increasing the impact of extreme rainfall.

For now, authorities remain focused on dewatering operations, monitoring Nullah Lai and managing the effects of continued rainfall. With further rain possible, residents across the twin cities have been advised to remain alert and follow official safety instructions.

The September 1 rainfall has highlighted once again how quickly intense monsoon weather can overwhelm urban drainage systems in Islamabad and Rawalpindi.