The World Weather Attribution (WWA) report has said that the ongoing heatwave in Bangladesh and other South Asian countries became 45 times more likely due to climate change.
According to a recent finding by the WWA on heatwaves in Asia, if the global temperature rises from the current 1.2 degrees Celsius to 2 degrees Celsius, the recurrence of extreme heat incidents is more probable, this quantifies the effect of human-caused warming on extreme temperatures, according to a release.
The study was conducted by 13 researchers as part of the WWA group, including scientists from universities and meteorological agencies in Malaysia, Sweden, the Netherlands, and the United Kingdom.
"The month was the hottest April on record globally and the eleventh consecutive month in a row a hottest month record was broken. Heat-related deaths were widely reported, with at least 28 in Bangladesh, five in India, and three in Gaza during April. Surges in heat deaths have also been reported in Thailand and the Philippines this year," it said.
The heat also led to crop failure, loss of livestock, water shortages, mass die-off of fish, widespread school closures, and low voter turnout in Kerala, India, it said. Bangladesh has been facing increasing heat waves during summer for the last couple of years.
The ongoing year is the hottest yet, recording average temperatures of 40 to 42 degrees Celsius in all the districts. The population and biodiversity of the country are at stake due to such an unprecedented catastrophe.
In this area, 30-day heatwaves typically occurred once every 30 years. However, due to climate change, they have become 45 times more likely and 0.85°C hotter. This aligns with previous WWA studies, indicating April heatwaves became 1°C hotter and 10-30 times more likely. Additionally, analysis shows similar heatwaves are twice as likely during El Niño conditions.
In South and Southeast Asia, Myanmar, Laos, and Vietnam broke records for their hottest April day, and the Philippines experienced its hottest night ever.
In India, temperatures reached as high as 46ºC. The heat was also extreme in West Asia, with Palestine and Israel experiencing temperatures above 40°C.
"From Gaza to Delhi to Manila, people suffered and died when April temperatures soared in Asia. Heatwaves have always happened. But the additional heat, driven by emissions from oil, gas, and coal, is resulting in death for many people. If humans continue to burn fossil fuels, the climate will continue to warm, and vulnerable people will continue to die," said Friederike Otto, Senior Lecturer in Climate Science at Grantham Institute - Climate Change and the Environment, Imperial College London.
Extreme temperatures above 40°C that impacted billions of people across Asia in April were made hotter and more likely by human-caused climate change.
The study highlights how heatwaves intensified by climate change are making life much tougher for people living in poverty across Asia and the 1.7 million displaced Palestinians in Gaza. The scientists also analyzed historical weather data for a South Asian region including India, Bangladesh, Myanmar, Laos, Vietnam, Thailand, and Cambodia. If the global temperature rises from the current 1.2 degrees Celsius to 2 degrees Celsius, the recurrence of extreme heat incidents is more probable.
These are only preliminary figures, and because heat-related deaths are notoriously underreported, it is likely there were hundreds or possibly thousands of other heat-related deaths in Asia during April.
Climate change, resulting from fossil fuel combustion and deforestation, intensifies global heatwaves, making them more frequent, prolonged, and severe. To assess human-induced warmings impact on extreme temperatures in Asia, scientists analyzed weather data and climate models, comparing todays climate (approximately 1.2°C warming) to pre-industrial levels.
Focused on dangerous heat periods in West Asia and the Philippines, researchers examined maximum daily temperatures over three and 15-day averages, respectively. They also evaluated the El Niño-Southern Oscillations potential influence.
