Overnight Rain In Delhi, Surrounding Areas, Air Quality Improves Slightly
The National Capital Region (NCR), including Delhi, Noida, Ghaziabad, Faridabad, and Gurugram, experienced overnight rainfall starting Sunday evening, July 13, 2025, and continuing into Monday, July 14. The showers offered a welcome break from the intense heat and humidity that had dominated the region. However, the heavy downpour also led to significant waterlogging and traffic disruptions, impacting daily commutes and flight operations. While the rain caused inconvenience, it contributed to a slight improvement in air quality, a critical issue for Delhi, which often grapples with pollution. This mix of relief and challenges underscores the complex impact of monsoon rains on urban life in the NCR.
Weather Patterns and IMD Alerts
The India Meteorological Department (IMD) played a pivotal role in tracking and forecasting the rainfall. On Sunday, July 13, a red alert was issued for parts of South West Delhi, indicating heavy rainfall, while an orange alert covered other districts, signaling moderate to heavy showers. Safdarjung, Delhi’s primary weather station, recorded 10.1 mm of rainfall between 5:30 pm and 8:30 pm on Sunday, with Maidan Garhi and Pusa logging 13.6 mm and 10 mm, respectively. The IMD noted that dense clouds from the southeast, coupled with thunderstorms and lightning, drove the rainfall. The maximum temperature on Sunday reached 38.4°C, slightly above normal, but was expected to drop to around 33°C on Monday, providing relief. High humidity levels, ranging from 58% to 81%, persisted, creating muggy conditions despite the cooler weather.
Air Quality Sees Marginal Improvement
Delhi’s air quality, a longstanding concern, showed slight improvement due to the rainfall. On Monday, July 14, the Air Quality Index (AQI) was recorded at 65, falling within the “satisfactory” category (51–100), according to the Central Pollution Control Board (CPCB). This followed a 16-day period of satisfactory air quality that ended on Saturday, July 12, when the AQI briefly rose to 105, entering the “moderate” category. The monsoon rains, aided by easterly and southeasterly winds, helped disperse pollutants, leading to cleaner air. Delhi Environment Minister Manjinder Singh Sirsa credited the government’s Environment Action Plan 2025 for the sustained improvement, though seasonal factors like frequent rainfall significantly contributed during the monsoon season.
Disruptions Caused by Waterlogging
While the rain improved air quality, it also brought significant disruptions. Waterlogging was reported in key areas such as Nehru Place, Aurobindo Marg, Lodhi Road, ITO, and National Highway 8, causing severe traffic congestion. The Delhi Police Traffic issued advisories, urging commuters to avoid flood-prone routes. The Delhi Airport Authority recommended using the Delhi Metro to access the Indira Gandhi International Airport, as flight operations faced delays. Air India issued a travel advisory on Monday, warning of potential disruptions due to rain and thunderstorms, with over 300 flights delayed the previous week due to similar weather conditions. These issues highlight the strain on Delhi’s urban infrastructure during heavy monsoon rains.
Forecast and Ongoing Impact
The IMD has forecast light to moderate showers in Delhi through Tuesday, July 15, with patchy rain expected to continue until Saturday. This ongoing rainfall is likely to maintain the slight improvement in air quality while posing challenges for commuters and infrastructure. The monsoon’s dual role—offering environmental benefits while straining urban systems—remains evident. As Delhi and the NCR navigate these conditions, the focus will be on balancing the advantages of cleaner air with the need for better preparedness to handle waterlogging and traffic disruptions.
