Why are Colour codes used?

• According to the Indian Meteorological Department (IMD), “colour codes are used in weather warnings for bringing out the severity of the weather phenomena expected”. 
• The key idea is to forewarn relevant officials and the disaster management authority “about the impact of the weather expected so as to keep them ready for necessary action related to disaster risk reduction”.

What do these colour codes mean?

• Green – No advisory– A green alert indicates that, while a weather event is possible, no advisory is required.
• Yellow – Be aware – A yellow alert denotes bad weather conditions and the possibility that the conditions will worsen, causing disruptions to daily life.
• Orange – Prepare – When extremely bad weather is forecast, an orange alert is issued to warn of potential disruptions to transport, rail, road, and air. Power outages are also likely.
• Red- Take action – A red alert is issued when an extremely bad weather condition is expected to disrupt transportation and power supply. It might also pose a risk to life.