The IMD's Colour-Coded System
During monsoon season, the India Meteorological Department (IMD) uses a four-colour coding system to issue weather warnings. The goal is to provide a simple, easy-to-understand alert for the public and disaster management authorities about the expected
severity of weather events like heavy rainfall. These alerts—Green, Yellow, Orange, and Red—are designed to help you make informed decisions, especially before you start your daily commute. Each colour corresponds to a different level of intensity and potential impact, allowing you to gauge whether it's safe to travel or better to stay put. Think of it as a traffic light for the weather, guiding you on when to proceed with caution or stop.
Green Alert: No Warning
A Green alert means 'All is well'. When this is issued, no significant weather-related disruptions are expected, and no specific advisory is needed from the authorities. For a commuter, a Green alert means your daily travel plans should not be affected by the weather. You can proceed with your commute as normal, whether by personal vehicle or public transport. While there might be light, sporadic showers, they are not predicted to be intense enough to cause waterlogging, traffic jams, or disruptions to train and bus services. It signals a day of normal monsoon weather without significant hazards.
Yellow Alert: Be Aware
A Yellow alert is a signal to 'Be Aware'. It indicates the potential for moderately bad weather that could worsen and cause some disruption to daily life. For commuters, this is a heads-up. It might mean moderate rainfall that could lead to minor traffic snarls or waterlogging in low-lying areas. Public transport might face slight delays. While you don't need to cancel your plans, it’s wise to build extra time into your journey, check for traffic updates before you leave, and exercise caution on the roads. It's a prompt to stay updated and be prepared for potential travel hindrances.
Orange Alert: Be Prepared
An Orange alert, also known as an 'Amber' alert, means you must 'Be Prepared'. It is issued when extremely bad weather is forecast, with a high likelihood of disruption. This typically involves predictions of heavy to very heavy rainfall (between 115.6 mm and 204.4 mm in 24 hours). For commuters, an Orange alert is a serious warning. You should expect significant disruptions to road, rail, and even air travel. Widespread traffic congestion and severe waterlogging are highly probable. There is also a potential for power outages. Authorities advise against non-essential travel. If you must commute, consider starting much earlier, using alternate routes, or checking if remote work is an option. Your safety could be at risk due to flooded streets and compromised infrastructure.
Red Alert: Take Action
A Red alert is the highest level of warning and means 'Take Action'. It is issued when extremely severe weather is expected, posing a significant threat to life and property. This often involves predictions of exceptionally heavy rainfall (over 204.5 mm in 24 hours). For commuters, a Red alert is a clear signal to avoid travel unless absolutely essential. Widespread and major disruptions to transport and power supply are almost certain. Authorities may issue evacuation orders for vulnerable areas, and there is a high risk of large-scale flooding and infrastructure damage. During a Red alert, the primary focus is on safety. Following the instructions of local disaster management authorities is crucial. Staying indoors and off the roads is the safest course of action.
