Lead

Ocean temperatures in March reached near-record highs, according to the European Union's Copernicus Climate Change Service, which also signaled a likely transition toward El Niño conditions. The announcement comes as the continental United States recorded its most abnormally hot month in over a century of data, according to federal weather records.

Coverage Comparison

Three separate reports—two from Deutsche Welle and one from The Guardian—covered the same underlying data but emphasized different aspects. The Deutsche Welle articles focused on the global ocean temperature readings and the anticipated shift from La Niña to El Niño, as reported by Copernicus and the World Meteorological Organization (WMO). The Guardian's coverage highlighted the severity of the U.S. heat records and quoted meteorologists warning of unprecedented conditions.

All sources attribute the warming trend to human-caused climate change, though the Guardian's tone was more alarming, describing the U.S. March as "unprecedented" and quoting experts who called the heat records "so concerning." The Deutsche Welle articles noted that warmer oceans can have damaging knock-on effects on the planet, a claim echoed across all three reports.

Key Claims

The most widely reported claims, confirmed by multiple sources, include:

  • Ocean temperatures for March hit near-record highs, with only March 2024 warmer, according to Copernicus data.
  • The continental United States registered its most abnormally hot month in 132 years of records, based on National Oceanic and Atmospheric Administration (NOAA) data.
  • The March average temperature in the U.S. was 9.35°F (5.19°C) above the 20th-century normal, easily surpassing the previous record set in March 2012.
Additional details reported by The Guardian, based on NOAA data, include:
  • The average maximum temperature for March was 11.4°F above the 20th-century average, nearly a degree warmer than the average daytime high for April.
  • Six of the nation's top 10 most abnormally hot months have occurred in the last 10 years.
  • April 2025 to March 2026 was the warmest 12-month period on record in the continental U.S.
  • On March 20 and 21, about one-third of the nation experienced heat that would have been "virtually impossible" without climate change, according to Climate Central calculations.
The Guardian also reported a forecast that a strong El Niño could plausibly push global temperatures to new record levels in late 2026 and into 2027, a claim not repeated in the Deutsche Welle articles, which instead cited a WMO prediction of El Niño developing later this year.

Perspectives

The reports from Deutsche Welle and The Guardian both emphasize the role of human-caused climate change in driving these extremes, but they differ in tone and focus. Deutsche Welle presents the data as a matter-of-fact update from European monitoring agencies, while The Guardian frames the U.S. heat as a crisis, citing experts like Shel Winkley of Climate Central, who noted the "sheer volume of records" and the context of the worst snow year and hottest winter on record.

The articles also explain the natural climate cycles of El Niño and La Niña, noting that El Niño conditions tend to amplify heat extremes on an already warming planet. The WMO's forecast, reported by Deutsche Welle, indicates that a cooling La Niña will give way to neutral conditions before transitioning to El Niño later this year.

While the exact timing and strength of the next El Niño remain uncertain, all sources agree that the combination of natural variability and human-induced warming is producing increasingly extreme conditions. The Copernicus data cited in the reports show that global surface temperature has already risen by 1.3°C to 1.4°C above pre-industrial levels, approaching the 1.5°C target set by the Paris Agreement.