Study Warns Heatwave Frequency Surge Worldwide

(MENAFN) A worldwide study led by Australian scientists has revealed a significant surge in extreme heat events over the last three decades, emphasizing the critical need for comprehensive measures to combat escalating heat and humidity levels.

This extensive research, conducted by specialists from 18 institutions across Australia, the U.S., Europe, and Asia, reported that the average annual heatwave days rose sharply—from 12 days between 1990 and 2006 to 19.3 days during 2007 to 2023. Over the entire 33-year period under review, the average stood at 15.6 heatwave days per year, according to the Monash University researchers heading the study.

The increase was especially pronounced in regions such as Africa, the Middle East, and parts of Asia, stated a Monday release from Monash University, the study’s lead institution.

For the first time, scientists combined ambient temperature data with wet-bulb globe temperature measurements—which factor in humidity, solar radiation, and wind—to more precisely chart the global distribution of extreme heat.

"This matters because humidity dramatically amplifies heat stress and health risks, especially in vulnerable populations," said the study's first author Zhou Shuang from Monash University.

Published in the United States' Annual Review of Environment and Resources, the findings highlight that heatwaves trigger direct health problems like heatstroke and cardiovascular disease, alongside indirect consequences such as mental health disorders, pregnancy complications, and disruptions to energy supply—all of which exacerbate both health and economic challenges.

To address these mounting risks, the researchers outlined a comprehensive, multilevel heat preparedness strategy. This approach calls for coordinated international efforts, national policymaking, institutional collaboration, community engagement, and individual-level safeguards.

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