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New data from the National Centers for Environmental Protection shows the Earth reaching its hottest temperature since record keeping began, fueling ongoing concerns about both human-induced global warming and the reemergence of El Nio.

Monday saw an average global temperature of 17.01 degrees Celsius (62.62 degrees Fahrenheit), according to an analysis by researchers from the University of Maine of data collected by the National Centers for Environmental Prediction.

Thats the hottest average global temperature ever recorded on any day of the year, according to the data analysis, beating the previous record of 16.92 degrees Celsius, which occurred on both July 24, 2022 and Aug. 14, 2016.

Experts have attributed this to a combination of human-induced climate change and the emergence of El Nio, a weather pattern that occurs every two to seven years due to wind patterns in the Pacific Ocean and is known for bringing increased temperatures worldwide.

The Intergovernmental Panel on Climate Change reports that because of human activity the global surface temperature of the Earth has increased 1.1 degrees Celsius during the period of 2011 to 2020 compared to the period of 1850 to 1900, which has caused increased wildfires, flooding and decreased food availability around the world.

The World Meteorological Association said it expects 2024 to look like 2016, the current hottest year on record, which was so warm because of a double whammy of the last time El Nio occurred and human-induced climate change, a dynamic it expects to play out again.

Though NCEP CFSR (data) only begins in 1979, other data sets let us look further back and conclude that this day was warmer than any point since instrumental measurements began, and probably for a long time before that as well, Robert Rohde, lead scientist for Berkeley Earth, a U.S. non-profit focused on environmental data science and analysis, wrote on Twitter Tuesday. Global warming is leading us into an unfamiliar world.

These rising temperatures have been felt acutely across the southern U.S. A dangerous heat wave has brought triple digit temperatures to a swath of the country spanning from Florida to Arizona for the past three weeks. Tens of millions of Americans were under an excessive heat warning from the National Weather Service Tuesday. In June, at least thirteen were killed by the heat in Texas, where some of the highest temperatures were seen, as well as two in Louisiana, according to the Associated Press.

El Nio Returns: UN Warns Of Upcoming Surge In Global Temperatures And Extreme Heat (Forbes)

July 4 Holiday Forecast: Expect Extreme Heat, Severe Storms In These Cities (Forbes)

New Orleans, Miami, San Antonio Break Heat Records: Heres Where Else Temperatures Are Hitting Record Levels (Forbes)

I am a Chicago-based breaking news reporter at Forbes. Prior to joining Forbes, I wrote for newspapers such as The Times of Northwest Indiana and The Washington Missourian. I also studied journalism at the University of Missouri. Follow me on Twitter @WillSkipworth or get in touch at wskipworth@forbes.com.

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July 3: Earth Experiences Hottest Day On Record - Forbes