Know Your Zone: Are You in a High-Risk Area?
The first step in assessing your risk is knowing your location's history and official designation. The Brihanmumbai Municipal Corporation (BMC) and the Geological Survey of India (GSI) have identified numerous landslide-prone areas across the city. According
to recent reports, 74 areas are considered particularly vulnerable, with the highest concentration of 45 in the eastern suburbs, 16 in the island city, and 13 in the western suburbs. Areas like Ghatkopar, Kurla, Bhandup, Vikhroli, and Malabar Hill are frequently cited. The BMC often issues notices to residents in these zones before the monsoon, urging caution or evacuation. You can contact your local ward office or the BMC's disaster management cell to inquire about your specific location and to understand if it falls within a high, medium, or low-risk classification.
Look for Physical Clues in Your Surroundings
The land itself often provides early warning signs. Be vigilant and regularly inspect the area around your home for subtle but significant changes. Look for new cracks appearing in the ground, on pavements, or on retaining walls. These are often called tension cracks and indicate that the ground is under stress. Other visual signs include bulging or swelling ground at the base of a slope, which suggests that earth is being pushed outwards. Pay attention to structural changes like doors or windows that suddenly begin to stick, new cracks in plaster or foundations, or outside walls and stairs pulling away from the main building. Even trees, fences, and utility poles can act as indicators; if they start to tilt, it’s a clear sign the ground beneath them is shifting.
Watch for Changes in Water Flow
Water is the most common trigger for landslides, as it saturates and weakens soil. Therefore, changes in how water behaves on and around a slope are critical signs. Be on the lookout for new springs, seeps, or patches of wet ground in areas that are normally dry. A sudden increase in water flow from existing springs after heavy rain is another red flag. If you are near a stream or channel, be alert for any abrupt increase or decrease in water flow. Another crucial indicator is a change in the water's clarity—if it suddenly turns muddy, it could mean that soil and debris are being carried from upstream, a precursor to a larger flow.
Listen for Unusual Sounds
Sometimes, the most immediate warning is auditory. If you are near a slope, especially during or after intense rainfall, listen for unusual sounds. Faint rumbling noises that grow in volume, the cracking sound of trees, or boulders knocking together are all signs that debris may be on the move. These sounds can indicate that the internal structure of the slope is failing. By the time you hear a definite rumble, a debris flow might be imminent, making it crucial to move away from its path as quickly as possible.
Create a Household Action Plan
Knowing the risks is only half the battle; being prepared to act is essential. Every household in a risk-prone area should have a clear action plan. This starts with assembling an emergency kit containing essentials like non-perishable food, water, a first-aid kit, a battery-powered torch, and charged power banks. Keep copies of important documents in a waterproof bag. Download the BMC's disaster management app to stay updated on warnings and find locations of temporary shelters. Discuss and establish an evacuation plan with your family, ensuring everyone knows the safest route to higher ground. During a severe storm, stay alert and awake, and listen to local news or official announcements for instructions. If authorities issue an evacuation order, follow it immediately.
