Bengaluru witnessed another spell of heavy rainfall that disrupted normal life across several parts of the city. The downpour left roads waterlogged and slowed traffic on important stretches, adding to the challenges faced by commuters during peak travel hours.
Reports on the latest spell of rain said areas including Koramangala, City Market/KR Market and several central and southern parts of Bengaluru were affected. The India Meteorological Department has also forecast the possibility of rain or thundershowers accompanied by lightning during the evening or night on September 16.
The latest rainfall comes after Bengaluru experienced an unusually warm September, making the sudden shift to heavy showers particularly noticeable.
Bengaluru experienced heavy rainfall that caused waterlogging and traffic disruption across several parts of the city. Reports said the Tuesday evening downpour affected areas including Koramangala, City Market, Jayanagar, Wilson Garden, HSR Layout, Bellandur, Varthur and other locations.
The IMD forecast for September 16 indicates that Bengaluru can expect rain or thundershowers toward the evening or night, with thunderstorms and lightning possible.
Commuters have been advised to allow additional travel time, avoid waterlogged stretches where possible and exercise caution during thunderstorms.
Bengaluru Heavy Rainfall: What Happened?
The latest downpour arrived after several days of unusually warm weather in the city.
According to the New Indian Express, heavy rain began around 6 pm on Tuesday and affected multiple parts of Bengaluru. Waterlogging was reported in several locations, while traffic movement became difficult.
Areas reported to have been affected included:
- Koramangala
- HSR Layout
- Bellandur
- Varthur
- City Market
- Jayanagar
- Wilson Garden
- MG Road
- Shanthinagar
- Kalasipalya
- Chickpet
- Whitefield
- KR Puram
- Chamarajpet
- Tavarekere
- Sarjapur
The impact varied by location, with some roads experiencing significant water accumulation and traffic slowdowns.
Koramangala Waterlogging and Traffic
Koramangala was among the areas affected by the heavy rainfall.
The neighbourhood is one of Bengaluru's major residential, commercial and technology corridors. Heavy rainfall can quickly affect traffic movement because of the large volume of vehicles using its connecting roads.
For commuters travelling through Koramangala during or immediately after intense rainfall, even relatively short journeys can take substantially longer.
Commuters should consider:
- Checking traffic conditions before leaving.
- Avoiding visibly flooded roads.
- Maintaining greater distance between vehicles.
- Watching for open manholes or damaged road surfaces.
- Avoiding unnecessary two-wheeler travel during lightning and intense rain.
KR Market and Central Bengaluru Face Rain Disruption
The City Market/KR Market area was also among the locations affected by the rainfall.
KR Market is a busy commercial area with substantial pedestrian and vehicle movement. Waterlogging in such a location can create problems for shoppers, traders, delivery workers, buses, auto-rickshaws and private vehicles.
Heavy rain can also reduce visibility, making driving conditions more difficult even where waterlogging is limited.
Sankey Road and Other Important Roads
Sankey Road is an important north-central Bengaluru corridor connecting several residential and commercial areas.
During intense showers, traffic conditions can deteriorate quickly when vehicles slow down because of poor visibility, standing water or fallen branches.
Motorists should therefore avoid sudden lane changes and maintain a safe distance from other vehicles.
Bengaluru Weather Today: What Does the IMD Forecast Say?
The India Meteorological Department's Bengaluru forecast indicates that rain or thundershowers are possible toward the evening or night on September 16, with thunderstorms accompanied by lightning listed in the warning information.
The IMD's Bengaluru station data also show that the city has been experiencing above-normal temperatures in recent days.
At Bengaluru HAL Airport, the maximum temperature recorded on September 15 was 31°C, while rainfall during the preceding 24-hour observation period was 27.6 mm.
Bengaluru Forecast Snapshot
| Date | Expected Conditions | Temperature Range |
|---|---|---|
| September 16 | Rain/thundershowers toward evening/night; thunder and lightning possible | 21°C–32°C |
| September 17 | Generally cloudy, light rain possible | 21°C–31°C |
| September 18 | Generally cloudy, light rain possible | 21°C–31°C |
| September 19 | Partly cloudy | 21°C–31°C |
Forecast based on IMD Bengaluru information available on September 15–16, 2026.
Why Does Bengaluru Flood So Quickly During Heavy Rain?
Bengaluru's waterlogging problem is influenced by several factors rather than rainfall alone.
1. Intense rainfall in a short period
When a large amount of rain falls quickly, drainage systems may struggle to remove water fast enough.
2. Urban development
Large areas of paved surfaces prevent rainwater from naturally soaking into the ground.
3. Drainage capacity
Storm-water drains can become overwhelmed during intense rainfall.
4. Blockages
Garbage, silt and other debris can restrict the movement of storm water.
5. Low-lying roads
Water naturally collects in depressions and low-lying stretches, making these locations particularly vulnerable.
Bengaluru Traffic During Heavy Rain
Rain and traffic congestion often reinforce each other.
When roads become wet or waterlogged:
- Vehicles reduce speed.
- Lane capacity decreases.
- Minor incidents can create additional bottlenecks.
- Public transport can be delayed.
- Travel times increase.
- Congestion spreads to connecting roads.
This means that a waterlogged road in one locality can affect traffic considerably farther away.
Heavy Rainfall Safety Guide for Bengaluru Commuters
For Car Drivers
- Drive slowly through wet roads.
- Avoid entering deep or unfamiliar water.
- Do not follow another vehicle blindly through floodwater.
- Keep headlights on when visibility is poor.
- Avoid parking underneath large trees.
- Check brakes after driving through water.
For Two-Wheeler Riders
Two-wheelers face additional risks during heavy rain.
- Wear a properly fitted helmet.
- Use waterproof protective clothing.
- Avoid flooded roads.
- Do not attempt to cross fast-moving water.
- Watch for potholes hidden beneath standing water.
- Avoid riding during severe thunderstorms when possible.
For Pedestrians
- Stay away from exposed electrical equipment.
- Avoid walking through deep water.
- Be cautious around construction sites.
- Do not stand underneath trees during strong winds.
- Use elevated pedestrian routes where available.
Heavy Rainfall: Pros and Cons for Bengaluru
Potential Benefits
- Provides temporary relief from hot weather.
- Replenishes water resources.
- Supports vegetation.
- Can improve short-term air quality.
- Helps recharge groundwater in suitable areas.
Problems Caused by Intense Downpours
- Road waterlogging
- Traffic congestion
- Delayed public transport
- Reduced visibility
- Fallen trees and branches
- Power-related hazards
- Damage to property in vulnerable locations
- Difficulties for pedestrians and two-wheeler riders
Rain vs Traffic Impact in Bengaluru
| Factor | Normal Conditions | Heavy Rain Conditions |
|---|---|---|
| Road visibility | Generally clear | Reduced |
| Vehicle speed | Normal | Lower |
| Road capacity | Normal | Reduced |
| Waterlogging | Limited/none | Possible |
| Travel time | Predictable | Can increase sharply |
| Two-wheeler safety | Normal | Higher risk |
| Pedestrian movement | Easier | More difficult |
| Traffic congestion | Routine | Potentially severe |
What Should Bengaluru Residents Do During Heavy Rain?
Before leaving home
- Check the latest weather forecast.
- Check traffic conditions.
- Keep a raincoat or umbrella available.
- Charge your phone.
- Avoid unnecessary travel during severe weather.
While travelling
- Slow down.
- Keep sufficient distance from other vehicles.
- Avoid flooded underpasses.
- Do not drive through water if you cannot judge its depth.
- Follow traffic police instructions.
After reaching home
- Avoid touching electrical equipment with wet hands.
- Check for water entering the premises.
- Keep emergency numbers accessible.
- Report major road hazards to the relevant civic authorities.
Bengaluru's Unusual September Weather
The latest rain is particularly notable because Bengaluru has experienced an unusually warm September.
Hindustan Times reported that the Bengaluru city observatory recorded 32.1°C on September 15, around 3.5°C above normal. The report also noted that the Kempegowda International Airport observatory had recorded 33.9°C on September 13, described as the highest September temperature in the airport's historical record.
The IMD attributed the recent warmth to factors including limited cloud cover, poor monsoon conditions and dry north-westerly surface winds.
This makes the recent transition from hot, relatively dry conditions to intense evening rainfall particularly striking.
Expert Perspective: Why Short, Intense Rain Can Cause Urban Flooding
Urban flooding does not necessarily require rainfall to continue for an entire day.
A concentrated downpour can produce significant surface runoff within a short period, particularly in densely built-up areas.
From an urban-planning perspective, managing such events requires more than simply increasing drainage capacity. Effective storm-water management can also involve:
- Maintaining existing drains.
- Protecting natural drainage channels.
- Increasing permeable surfaces.
- Improving rainwater harvesting.
- Preventing construction over drainage paths.
- Improving early-warning systems.
- Maintaining roads and culverts.
The recent Bengaluru episode demonstrates how quickly weather can affect transportation and everyday urban life.
Key Takeaways
- Bengaluru experienced heavy rainfall that caused waterlogging and traffic disruption across several areas.
- Koramangala, City Market/KR Market and other parts of central and southern Bengaluru were among the affected locations.
- The IMD forecasts another possibility of rain or thundershowers toward the evening or night on September 16, with lightning possible.
- Bengaluru has also experienced unusually high September temperatures in recent days.
- Commuters should exercise additional caution around waterlogged roads, poor visibility and thunderstorms.
- A short period of intense rain can create major traffic problems even when rainfall does not continue throughout the day.
Frequently Asked Questions
1. Is Bengaluru receiving heavy rain today?
Bengaluru experienced heavy rain on Tuesday evening, and the IMD forecast indicates that rain or thundershowers are possible again toward the evening or night on September 16.
2. Which Bengaluru areas were affected by waterlogging?
Reports identified several affected areas, including Koramangala, City Market, Jayanagar, Wilson Garden, HSR Layout, Bellandur, Varthur, Whitefield and others.
3. Is Koramangala affected by the rain?
Yes. Koramangala was among the Bengaluru areas reported to have experienced the impact of the heavy rainfall.
4. Did heavy rain affect KR Market?
Yes. City Market/KR Market was among the areas affected by the downpour and waterlogging.
5. What is the Bengaluru weather forecast for September 16?
The IMD forecast indicates rain or thundershowers toward evening or night, with thunderstorms accompanied by lightning possible.
6. What temperature is expected in Bengaluru?
The IMD forecast listed a minimum of around 21°C and a maximum of around 32°C for September 16.
7. Why does Bengaluru experience waterlogging after heavy rain?
Intense rainfall, paved surfaces, drainage limitations, blockages and low-lying roads can combine to produce waterlogging.
8. Is it safe to ride a two-wheeler during heavy rain?
Two-wheeler riders face increased risks from poor visibility, slippery surfaces, potholes and waterlogged roads. Avoiding unnecessary travel during intense rain is advisable.
9. Should motorists drive through flooded roads?
Motorists should avoid entering waterlogged roads when the depth or condition cannot be safely assessed.
10. Will Bengaluru receive more rain?
The IMD forecast indicates the possibility of rain or thundershowers on September 16 and lighter rain possibilities on subsequent days.
11. Has Bengaluru been unusually hot this September?
Yes. Recent temperatures have been above normal, with the city observatory recording 32.1°C on September 15 and the airport recording 33.9°C on September 13.
12. What should people do during thunderstorms?
Residents should avoid exposed outdoor locations, stay away from trees and electrical infrastructure, and postpone unnecessary travel during severe thunderstorms.
13. Can heavy rain cause traffic jams even if roads are not flooded?
Yes. Reduced visibility, slower vehicle speeds and minor incidents can reduce road capacity and create congestion.
14. Where can residents check official Bengaluru weather information?
The India Meteorological Department's Bengaluru Urban Meteorological Services provides current observations, forecasts and warnings for the city.
15. What is the most important precaution during heavy Bengaluru rain?
Avoid unnecessary travel during the most intense rainfall and never attempt to cross deep or fast-moving floodwater.
Published on : 16th September
Published by : Shanlee JV
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