Climate change fuels global hottest day

The planet's temperature spiked on Tuesday to its hottest day in decades and likely centuries, and Wednesday could become the third straight day Earth unofficially marks a record-breaking high. It's the latest in a series of climate-change extremes that alarm but don't surprise scientists.

The globe's average temperature reached 62.9 degrees Fahrenheit (17.18 degrees Celsius) on Tuesday , according to the University of Maine’s Climate Reanalyzer, a common tool based on satellite data, observations, and computer simulations and used by climate scientists for a glimpse of the world’s condition.

On Monday, the average temperature was 62.6 degrees Fahrenheit (17.01 degrees Celsius), setting a record that lasted only 24 hours.

For scientists, it’s a sweaty case of I-told-you-so.

National Oceanic and Atmospheric Administration chief scientist Sarah Kapnick said the global heat is from a natural El Nino warming of the Pacific that heats up the planet as it changes worldwide weather on top of human-caused climate change from the burning of coal, oil and gas.

University of Maine climate scientist Sean Birkle, creator of the Climate Reanalyzer, said the daily figures are unofficial but a useful snapshot of what’s happening in a warming world.

Scientists generally use much longer measurements — months, years, decades — to track the Earth’s warming. But the daily highs are an indication that climate change is reaching uncharted territory.

With many places seeing temperatures near 100 degrees Fahrenheit (37.8 degrees Celsius), the new average temperatures might not seem very hot.

But Tuesday’s global high was nearly 1.8 degrees Fahrenheit (a full degree Celsius) higher than the 1979-2000 average, which already tops the 20th- and 19th-century averages.

High-temperature records were surpassed this week in Quebec and Peru.

Beijing reported nine straight days last week when the temperature exceeded 95 degrees Fahrenheit (35 degrees Celsius). And cities across the U.S. have been hovering at all-time highs.

“We're going to continue to break records as climate change continues until that point where emissions of greenhouse gases are no longer accumulating in the atmosphere,” Kapnick warned.