BackSCIENCE_HEALTH
Heat That Doesn't Sleep: Nights Turn Warmer Across India Amid Heatwave
India faces a severe heatwave with daytime temperatures above 45°C and widespread alerts. Nighttime temperatures are unusually elevated, with Delhi and other regions recording warm nights that heighten heat stress.
Why It Matters
Persistent warm nights reduce the body's ability to recover after sunset and increase health risks for vulnerable groups, outdoor workers, and those in poorly ventilated conditions.
Timeline
6 Events
IMD summer outlook 2026: above-normal minimum temperatures likely across most parts of India
April 28, 2026
The Met Department's summer outlook for 2026 indicates above-normal minimum temperatures are likely across most parts of the country, suggesting nighttime warmth could persist even if daytime heat eases.
IMD warns warm nights across Delhi, Haryana and Uttar Pradesh; min temps 26-29°C for several days
April 28, 2026
The India Meteorological Department warned that warm-night conditions are likely across parts of Delhi, Haryana and Uttar Pradesh, with minimum temperatures expected to remain between 26 and 29°C for several days.
Wide regional departures: Umaria, Phalodi, Muzaffarnagar highest above normal
April 28, 2026
Across the country, at least 17 stations recorded minimum temperatures more than 5°C above normal, with Umaria (7.7°C above normal), Phalodi (7.6°C), and Muzaffarnagar (6.1°C) showing the largest departures.
April 28, 2026: Delhi night peak reading noted for April 29
April 28, 2026
The article notes a Delhi night reading peaking near 28.5°C on April 29, reflecting the ongoing heat retained at night.
April 18, 2026: Delhi minimum temperatures stay above long-term average
April 18, 2026
Between April 18 and April 29, nighttime temperatures in Delhi stayed above the long-term average on almost every day and repeatedly breached normal limits, a pattern typically seen closer to late May.
Mid-April 2026: Delhi begins recording unusually warm nights
April 15, 2026
From mid-April 2026, Delhi began recording unusually warm nights, with several days seeing minimum temperatures cross 22°C as the pattern of warm nights emerged.