As Delhi continues to battle sweltering temperatures, the India Meteorological Department (IMD) has extended the yellow alert for heatwave conditions in the national capital till Wednesday (April 9). The alert comes a day after Delhi recorded its first official heatwave of the season on Monday, with temperatures soaring past the 40-degree Celsius mark at several monitoring stations.
First Heatwave of 2025 Hits Delhi
According to the IMD, Safdarjung, which serves as the city’s base observatory, recorded a maximum temperature of 40.2°C on Monday — a clear indicator of heatwave conditions. Other parts of Delhi also reported searing heat, with Ridge and Ayanagar recording a scorching 41°C, and Palam and Lodhi Road registering around 39°C.
This early arrival of extreme heat has raised concerns, especially since Delhi generally touches 40°C in the second half of April. The IMD has confirmed that this is the first time in three years that the capital has experienced a heatwave in April.
“Three stations — Safdarjung, Ridge, and Ayanagar — met the heatwave criteria today, marking the first day of heatwave conditions this season. These conditions are likely to continue until April 9. From April 10 onwards, a drop in temperature is expected over Northwest India, including Delhi,” the IMD said in a statement, reported by PTI.
What’s Causing the Heatwave?
Weather experts have attributed the sudden spike in temperature to the absence of western disturbances and clear skies that have allowed heat to build up rapidly. Additionally, dry northwesterly winds blowing over the region have contributed to the intense heat.
Relief in Sight From Thursday
The IMD has predicted a gradual drop in temperature starting Thursday (April 10). Between April 11 and 13, Delhi is expected to see daytime temperatures ranging between 37°C and 39°C, along with partly cloudy skies. This is likely to offer some much-needed respite for Delhiites who have been reeling under the heat.
However, even with the forecasted dip, temperatures will continue to remain above normal for this time of the year. The IMD has urged people to take necessary precautions and avoid prolonged exposure to the Sun, especially between 12 noon and 4 PM.
Heatwave Alert Categories: What Do They Mean?
The IMD issues colour-coded alerts based on the intensity of the heat:
Yellow Alert: Indicates moderate heat, generally tolerable, but can pose risks for vulnerable populations including infants, elderly, and those with chronic conditions. Residents are advised to wear light cotton clothes, stay hydrated, and limit outdoor activity.
Orange Alert: Signifies severe heat, with increased risk of heat-related illnesses among people exposed to the Sun for prolonged periods or those involved in heavy outdoor work. Precautions like drinking ORS, lemon water, and staying in cool places are strongly recommended.
Red Alert: The highest warning level, indicating extremely severe heatwave conditions. There is a very high likelihood of heatstroke and heat-related illnesses for all age groups. Extreme caution and care for the vulnerable population is advised.
Early April Heatwave After a Gap of 3 Years
Delhi’s early April heatwave marks a return of extreme weather that hasn’t been seen since 2022. Back then, the city had recorded its first April heatwave on April 8, when the temperature reached a scorching 41.6°C. In contrast, 2023 and 2024 saw no official heatwave in April, despite some areas touching 40°C.
This year’s heatwave could potentially signal a warmer-than-usual summer ahead, with climate experts warning of longer and more intense heat spells across north India.
IMD’s Advisory for Delhi Residents
In light of the ongoing heatwave, the IMD has issued a list of do’s and don’ts to help people stay safe:
Stay indoors during peak hours (12 PM – 4 PM)
Keep yourself hydrated – drink water even if you’re not thirsty
Wear loose, light-coloured, cotton clothing
Use umbrellas, caps, or cloth coverings while going out
Avoid strenuous outdoor activities
Watch for signs of heat-related illnesses like dizziness, cramps, nausea, and headaches
As Delhi braces for another hot day, all eyes are on Thursday when a dip in temperatures is expected to bring much-needed relief. Until then, residents are urged to remain cautious and follow heatwave safety guidelines.