El Niño weather pattern could lead to an estimated 451,000 additional heat-related deaths worldwide by February, according to projections from the Climate Impact Lab at the University of Chicago.

Researchers said the warming phenomenon may increase global temperatures and intensify the effects of climate change. The weather pattern was declared in June and is expected to reach its peak later this year.

The study suggests this El Niño event could become one of the strongest on record. Researchers estimated that global land temperatures may remain around 1.2°C above normal levels in the coming months.

The higher temperatures could result in approximately 44% more extremely hot days compared to an average year. These conditions may increase health risks, especially in regions already affected by heat stress.

Developing countries are expected to experience a significant share of the projected impact. The Sahel region of Africa could face around 66,800 additional heat-related deaths, with nearly half of these expected in Nigeria.

Indonesia is projected to record about 19,300 additional deaths linked to extreme heat. Meanwhile, the Philippines, Vietnam, Thailand, and Cambodia could collectively see around 19,400 more heat-related deaths.

The projections also include around 15,800 additional deaths in India and nearly 13,300 in Brazil. Researchers examined temperature-related mortality across 24,378 regions to estimate the possible impact.

The study combined regional health data with long-range weather forecasts to assess how rising temperatures may affect different populations.

The findings come after warnings from the United Nations about the potential risks of El Niño to global health. Experts have highlighted the need for better preparation as extreme heat events become more frequent.

Researchers said the projections can help governments develop preventive measures. These measures may include heat alerts, cooling centers, and hydration facilities for vulnerable communities.

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Authorities can use such planning tools to reduce health risks during periods of extreme temperatures. The report emphasizes the importance of early action as climate-related challenges continue to affect populations around the world.