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Climate Crisis Amplifies US-Mexico Heatwave, A Grave Warning Unveiled

Thursday 20 June 2024 - 16:35

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In a sobering revelation, scientists from the World Weather Attribution (WWA) group have unveiled that human-induced climate change has made the recent extreme heat experienced in the US Southwest, Mexico, and Central America approximately 35 times more likely. This alarming finding serves as a stark reminder of the escalating impact of global warming on extreme weather events.

The study, conducted by the WWA group, focused on the excessive heat that gripped the region between May and early June, when the US heatwave was concentrated in southwestern states like California, Nevada, and Arizona. During this period, Mexico also grappled with extreme temperatures that claimed numerous lives.

While attribution studies require time to complete, the scientists have already determined that such a heatwave is now four times more probable than it was in the year 2000, driven by the relentless release of planet-warming emissions.

Experts warn that many extreme weather events, including heatwaves, are becoming more frequent and intense as a consequence of climate change. "The results of our study should be taken as another warning that our climate is heating to dangerous levels," cautioned Izidine Pinto, a researcher at the Royal Netherlands Meteorological Institute.

Pinto emphasized the grave implications, stating, "Potentially deadly and record-breaking temperatures are occurring more and more frequently in the US, Mexico, and Central America due to climate change. As long as humans continue to fill the atmosphere with fossil fuel emissions, the heat will only worsen – vulnerable people will continue to die, and the cost of living will continue to rise."

The WWA study encompassed a region spanning the US Southwest, Mexico, Guatemala, Belize, El Salvador, and Honduras, all of which experienced dangerously high temperatures. The scientists determined that the hottest five-day stretch across the region in June was made about 1.4°C warmer by climate change.

Karina Izquierdo, Urban Advisor for the Latin American and Caribbean region at the Red Cross Climate Centre, underscored the severe consequences, stating, "Every fraction of a degree of warming exposes more people to dangerous heat. The additional 1.4°C of heat caused by climate change would have been the difference between life and death for many people during May and June."

Mexican officials have linked the heatwave to the deaths of scores of people, and it has also been blamed for the deaths of howler monkeys in the southern state of Tabasco. The scientists highlighted the danger posed by high night-time temperatures, which present a severe threat to health as the body does not have time to rest and recover.

The WWA group conducts rapid attribution studies on weather events worldwide to examine the role climate change has played in their severity. These studies compare the events against models of what would have likely occurred in a world not subjected to human-induced global warming, providing valuable insights into the escalating climate crisis.

As the world grapples with the consequences of a warming planet, this study serves as a grave warning, emphasizing the urgent need for collective action to mitigate the impacts of climate change and protect the most vulnerable populations from the escalating threat of extreme weather events.