Decoding the Colours of Caution
The India Meteorological Department (IMD) uses a four-colour coded system to warn citizens about a range of weather events, from heatwaves to heavy rainfall. These alerts are not just forecasts; they are actionable warnings designed to help the public
and civic authorities prepare and mitigate risks. Understanding what each colour means is the first step toward navigating the monsoon safely in a bustling city, where waterlogging, traffic jams, and power cuts are common challenges. The system is based on the likelihood of an event and its potential impact.
Green Alert: All Is Well
When the IMD issues a Green alert, it means 'All is well'. You can expect normal weather conditions with no significant rainfall expected that would disrupt daily life. No specific advisory is issued with a green alert, so it's safe to carry on with your outdoor plans and daily commute without any special precautions. Think of it as a green signal for your day's activities.
Yellow Alert: Be Aware
A Yellow alert is a signal to 'Be Aware'. It indicates that weather conditions could worsen over the next few days and there's a possibility of moderate to heavy rainfall (typically between 64.5 mm and 115.5 mm in 24 hours). This level of rain can cause localised waterlogging in low-lying areas and may disrupt your day-to-day activities. When you see a Yellow alert, it's wise to stay updated, check your route for traffic disruptions before leaving, carry an umbrella, and perhaps reconsider non-essential travel.
Orange Alert: Be Prepared
The Orange alert means 'Be Prepared' for extremely bad weather. This warning is issued when heavy to very heavy rainfall is expected (between 115.6 mm and 204.4 mm), with a high likelihood of disruptions. Expect significant traffic jams due to waterlogging, road and rail closures, and potential power supply interruptions. For urban residents, an Orange alert is a serious call to action. You should secure your home against water entry, check that your emergency kit is ready, charge your devices, and avoid unnecessary travel. Companies may consider advising employees to work from home.
Red Alert: Take Action
A Red alert is the highest level of warning and means 'Take Action'. It is issued when extremely heavy rainfall (over 204.5 mm in 24 hours) is forecast, posing a significant risk to life and property. Widespread flooding, major disruption to essential services, and structural damage are highly likely. Under a Red alert, authorities may issue evacuation orders for vulnerable areas. The primary advice is to prioritise safety above all else. Avoid all travel unless absolutely essential, stay indoors and away from windows, and follow all instructions from disaster management authorities.
Beyond the Alert: Your Urban Monsoon Plan
While IMD alerts provide the forecast, urban preparedness is a personal responsibility. Before the monsoon peaks, inspect your home for leaks, especially around windows, balconies, and walls. Clear gutters and local drains of debris to prevent blockages. It's also crucial to have an emergency kit with a flashlight, batteries, first-aid supplies, dry food, and clean drinking water. In the city, never attempt to walk or drive through flooded streets; hidden open manholes and potholes are a serious danger. Check your vehicle’s tyres and wipers, and always keep a safe distance in traffic during downpours.
