Record-High Ocean Temperatures and Widespread Heat Raise Climate Concerns

Global ocean temperatures outside polar regions hit unprecedented levels on June 21, according to the Copernicus Climate Change Service and the Copernicus Marine Service. The data revealed sea temperatures reaching 20.86 degrees Celsius, or 69.54 degrees Fahrenheit. This surpassed previous records for June in both 2023 and 2024. Additionally, the Copernicus Marine Service reported seas at 21 degrees Celsius, or 69.8 Fahrenheit, marking a new peak by 0.1 degree Celsius over previous years.

Richard Allan, a climate science professor at the University of Reading in the UK, emphasized that this is a stark indicator of how excessive greenhouse gasses are warming the planet. He noted that fossil fuel burning mainly contributes to these gasses, hindering Earth’s ability to release its heat into space. Temperatures in Chicago recently escalated to over 90 degrees Fahrenheit, illustrating this trend.

Oceans are crucial in absorbing more than 90% of Earth’s excess energy, primarily stemming from fossil fuel combustion. Rising sea temperatures offer a grim insight into climate change impacts with the added ’emerging influence of El Niño,’ according to Allan.

The information was released amid a severe US heat wave threat expected to peak during the July Fourth weekend. The National Weather Service issued extreme heat alerts for over 46 million Americans. This precarious condition is predicted to affect the central and eastern US, with temperatures soaring to mid-upper 90s, and possibly above 100 degrees.

Record-breaking highs are forecast in regions across the Ohio Valley, Mid-Atlantic, and Northeast by Thursday. Northern areas of Canada could face similar extreme heat conditions.

Europe also witnessed broken heat records recently. WHO chief Tedros Adhanom Ghebreyesus warned that over 1,300 excess deaths since June 21 are tied to high temperatures. France reported around 1,000 unexpected deaths due to its scorching heat wave.

Tedros highlighted that climate and global warming are transforming ‘once-in-a-generation’ heat waves into nearly annual occurrences in Europe. He noted that Europe, heating at twice the global average, is the fastest-warming continent. Many European homes, workplaces, and schools are not designed for such temperatures.