evidence: Scientists explain why the record-shattering 2023 heat has them on edge. Warming may be worsening [...] The Associated Press asked more than three dozen scientists in interviews and emails what the smashed records mean. Most said they fear acceleration of climate change that is already right at the edge of the 1.5 degrees Celsius (2.7 Fahrenheit) increase since pre-industrial times that nations had hoped to stay within. [...] Both NASA and NOAA said the last 10 years, from 2014 to 2023, have been the 10 hottest years they’ve measured. It’s the third time in the last eight years that a global heat record was set. Randall Cerveny, an Arizona State University scientist who helps coordinate record-keeping for the WMO, said the big worry isn’t that a record was broken last year, but that they keep getting broken so frequently.