Climate change is driving dangerous heatwaves across the Northern Hemisphere this week and will continue to deliver dangerous weather for decades to come, research shows. Christiana Figueres, a former U.N. climate agency chief, described it as a “worldwide heat wave” that underscores the urgent need for action. Here’s how climate change is pushing heat to new extremes.
The continued burning of fossil fuels releases more carbon emissions into the atmosphere, trapping more heat from the sun and causing the average global temperature to rise. Since the start of the Industrial Revolution, the global average temperature has risen nearly 1.3 degrees Celsius (2.3 degrees Fahrenheit). This higher baseline means that all heatwaves are now hotter than they would have been without atmospheric warming, making them more frequent and dangerous.
Scientists have conducted numerous attribution studies to determine the influence of climate change on specific heatwaves. These studies compare today’s weather systems with simulations of how they might have behaved if humans had not changed the atmosphere’s chemistry. For example, the dangerous heat across South Asia in April was found to be 45 times more likely to have occurred due to climate change. The heatwave pushed temperatures in Kolkata, India, to 46 degrees Celsius (115 degrees Fahrenheit), 10 degrees higher than the seasonal average.
Even if all carbon emissions were halted today, the world has already emitted enough to ensure that climate change will continue to push temperatures upward for decades. To limit further warming, the world must cut emissions in half from 1995 levels by 2030 and reach net-zero by 2050. However, global emissions have only increased since 1995, putting the world on track to reach 2.7 degrees Celsius (4.9 degrees Fahrenheit) by 2100. This surpasses the 1.5-degree Celsius (2.7 degrees Fahrenheit) threshold beyond which scientists predict catastrophic and irreversible climate impacts.
The fact that millions of people in the United States are experiencing unprecedented heatwaves is a clear indication that the worst of climate change has yet to be addressed. It is imperative that governments, businesses, and individuals take immediate and decisive action to reduce emissions and mitigate the impacts of climate change. By transitioning to renewable energy sources, improving energy efficiency, and protecting natural ecosystems, we can work towards a sustainable future for all.
The impact of climate change is not limited to the Northern Hemisphere. In Mecca, Saudi Arabia, Muslim pilgrims faced extreme heat during the annual haj pilgrimage, highlighting the global nature of the issue. Similarly, in India and China, heatwaves have become more frequent and intense, leading to health risks and economic challenges. These examples underscore the urgent need for a coordinated global response to address climate change and its impacts.
