Thanks to heavy rainfall on Thursday, July 9th, the air quality in the capital region of Delhi reached its best level in the last three years. If the Air Quality Index (AQI) was 122 on Wednesday, it dropped to 48 by 4:00 PM on Thursday. This allowed the air quality to transition from the 'Moderate' category to the 'Good' category.
Weather Warnings and Damage
Despite the environmental improvement, the heavy rains led to significant consequences for the city, including flooding in some areas due to overflowing drainage systems. Consequently, the India Meteorological Department (IMD) issued a 'Red' level warning, forecasting further rain, storms, and lightning throughout the day.
Achieving an Environmental Record
According to data from the Commission for Air Quality Management (CAQM), Thursday marked the first day with 'good' air quality in Delhi in 2026. The AQI reached 48, which corresponds to the 'Good' category (0–50) according to the National Air Quality Index. This is the lowest average daily AQI recorded in the capital this year, and it is particularly significant as it is the first such day since September 10, 2023.
Forecast for the Next 24 Hours
The Delhi-NCR region is preparing for the most intense period of this year's monsoon season. Meteorologists warn that over the next 24 hours, until midnight on July 10th, some parts of the territory may receive between 180 and 250 mm of precipitation. Heavy rains began at midnight on July 9th, causing inundations and creating mobility difficulties for residents in the morning. Furthermore, a drop in temperature has made the weather in Delhi-NCR cooler.
Regional Rainfall Distribution
Heavy rains occurred in Delhi, Noida, Ghaziabad, Gurugram, and Faridabad from Wednesday night into Thursday. Due to continuous rainfall, many underground passages and low-lying areas were submerged because the existing drainage system could not handle the volume of water. It is expected that the intensity of the monsoon rains will increase as the day progresses.
Expected Areas of Intense Rainfall
Forecasts indicate an uneven distribution of rainfall across the NCR. According to meteorologists, the highest amount of rain is expected in the eastern and northeastern parts of Delhi, as well as in Noida and Ghaziabad, where 180–250 mm may fall in some places by midnight. In central and southern Delhi, as well as in the eastern parts of Faridabad and Gurugram, strong or very strong rain is predicted, while western and southwestern parts of Delhi and West Gurugram are expected to receive relatively less, but still significant, amounts of precipitation. Short bursts of heavy rain, storms, and gusty winds are also possible in these areas.



