Decoding the Colours
The IMD uses a four-colour code system to issue weather warnings for various events, including heavy rainfall, thunderstorms, and cyclones. The purpose is to provide a simple, easy-to-understand alert that helps citizens and authorities gauge the severity
of the weather and take appropriate action. These alerts—Green, Yellow, Orange, and Red—are based on the probability of an event and its potential impact on life and property. For rainfall, these alerts are often tied to the amount of precipitation expected over a 24-hour period. Let's break down what each colour means for your daily commute or travel plans.
Green Alert: No Advisory
A green alert means 'All Clear'. It signifies that no severe weather is expected and you can carry on with your daily activities as planned. While there might be light or sporadic rainfall, especially during the monsoon, it is not predicted to be disruptive. For city travelers, a green alert means roads are expected to be clear, public transport should run on schedule, and there are no specific weather-related precautions you need to take. It is the ideal condition for any planned travel.
Yellow Alert: Be Aware
A yellow alert is a signal to 'Be Aware' or 'Watch'. It indicates that weather conditions could turn for the worse and potentially disrupt your day-to-day activities. In terms of rainfall, this alert is often issued for expected precipitation between 64.5 mm and 115.5 mm. While this may not sound extreme, it can lead to issues like waterlogging in low-lying areas, traffic congestion, and slippery roads. For travelers, a yellow alert is a heads-up to stay updated on the weather, allow for extra travel time, and be cautious while driving or walking. Your plans may not need to be cancelled, but they could be delayed.
Orange Alert: Be Prepared
When the IMD issues an orange alert, it's a call to 'Be Prepared'. This is a serious warning for extremely bad weather that has a high probability of causing disruptions. This typically involves forecasts of heavy to very heavy rainfall, between 115.6 mm and 204.4 mm in 24 hours. An orange alert suggests a significant risk of severe waterlogging, traffic diversions, and potential disruptions to power and communication networks. Non-essential travel should be reconsidered. If you must travel, check your route for closures, anticipate major delays on public transport, and prepare for challenging conditions.
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 imminent, posing a significant threat to life and property. For rainfall, this means a forecast of over 204.5 mm in a 24-hour period, which can lead to widespread flooding, major infrastructure damage, and necessitate evacuations in vulnerable areas. During a red alert, all non-essential travel should be avoided. Authorities will likely advise people to stay indoors and take immediate safety measures. Expect significant disruptions to all forms of transport—road, rail, and air—and essential services. Your priority during a red alert is to ensure your safety and follow the instructions of local authorities.
General Monsoon Travel Tips
Regardless of the specific alert, city travel during the monsoon requires extra caution. Always wear footwear with a good grip to avoid slipping on wet surfaces. Protect your electronic devices and important documents in waterproof bags. When driving, go slow, maintain a safe distance, and use your headlights in heavy rain. It's also wise to avoid walking through flooded streets, which can hide open manholes or other hazards. Before starting any journey, a quick check of the latest IMD district-wise warnings and local traffic updates can save you from getting stranded.
