The heat wave began affecting both
India and
Pakistan in early April 2025, with
meteorological agencies in both countries reporting temperatures reaching 5-8 °C above seasonal norms.
Weather authorities predicted the abnormal heat would persist longer than typical seasonal patterns, with the
India Meteorological Department warning citizens to prepare for an "above-normal number of heatwave days" throughout April. Meteorologists characterized the 2025 heat wave as part of a broader pattern of changing climate conditions affecting the Indian subcontinent.
Climate scientists identified the region as particularly vulnerable to thermal extremes, with projections suggesting that by mid-century, parts of India could be among the first global regions to experience temperatures exceeding human survivability thresholds. Climate experts warned that
socioeconomic disparities would likely determine exposure and adaptation capacity during extreme heat events. Communities lacking access to adequate housing, cooling technologies, and stable income sources faced disproportionate risks from increasing thermal extremes.
Barmer, a city in Rajasthan, recorded a peak temperature of on 8 April, representing a deviation of more than 6 °C above average April maximum temperatures for the region and breaking the decades-old April temperature records for the region. In
Jaipur, the capital of Rajasthan, temperatures exceeded for five consecutive days beginning 6 April. The city registered a peak temperature of on 9 April, approximately 5 °C above typical April high temperatures for the location. On 8 April, approximately thirty
weather stations spread throughout India documented temperatures exceeding , with many areas classified as experiencing severe heat wave conditions according to official meteorological standards. The extreme heat conditions triggered severe meteorological reactions in the eastern state of
Bihar, including its capital city
Patna. The meeting of sharply contrasting weather fronts generated intense
thunderstorm activity characterized by frequent lightning strikes, significant
hail, and powerful
wind gusts. These severe weather events resulted in at least nineteen fatalities over a two-day period.
Pakistan The southwestern Pakistani province of
Balochistan was predicted to record some of the most extreme conditions, with maximum temperatures potentially approaching , comparable to readings typically observed in
North America's
Death Valley. In a sea-facing city like Karachi, the temperature reading has become irrelevant as various rain systems just zip past the city towards Punjab or wherever, with hung clouds over the urban, leaving the Karachiites breezeless which is the only thing that gives respite from permanently severe humidity the city is notorious for. == Impact ==