The weather department had issued a red alert for Sunday, an orange alert for Monday, and a yellow alert for Tuesday and Wednesday.
On Sunday, the maximum temperature at Safdarjung, Delhi's base station, reached 44.9 degrees Celsius, six degrees above normal. This was slightly higher than Saturday's maximum of 44.6 degrees Celsius. The minimum temperature recorded was 33.2 degrees Celsius, also six degrees above normal, marking it as the second warmest June day in the last six years.
Humidity levels on Sunday ranged between 19% and 47%, with a heat index, or feel-like temperature, of 46 degrees Celsius.
Delhi has endured eight consecutive days of heatwave conditions, including three particularly warm nights.
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A heatwave is officially declared when the maximum temperature exceeds 40 degrees Celsius and is at least 4.5 degrees above normal. A severe heatwave occurs if the maximum temperature exceeds 45 degrees Celsius or is 6.5 degrees or more above normal.
The IMD defines a warm night as one where the day's maximum temperature is over 40 degrees Celsius, and the night-time temperature is 4.5 degrees or more above normal.
The IMD anticipates similar weather conditions continuing till Wednesday, with possible rain