Aqi Delhi
In short
The Air Quality Index in Delhi has reached hazardous levels today due to seasonal smog and stagnant winds. Residents are advised to stay indoors and wear protective masks.
In plain words
The air in Delhi is currently very dirty and unsafe to breathe. Tiny bits of dust and smoke are floating in the air in high amounts. This makes it hard for people to breathe properly.
A simple example
A person walking outside might feel a stinging sensation in their eyes or a cough. They would need to wear an N95 mask to filter out the particles.
Why it matters
Bad air quality causes serious lung and heart problems over time. It also forces schools to close and limits outdoor activities for everyone.
Easy to mix up
Do not confuse AQI with the weather forecast, which tells you about rain or temperature rather than air cleanliness.