March has been the hottest month on record for the continental United States in 132 years, according to federal weather data. The National Oceanic and Atmospheric Administration reports that March's average temperature was 50.85 degrees Fahrenheit, which is 9.35 degrees above the 20th-century norm. This surpasses the previous record set in March 2012. Climate Central meteorologist Shel Winkley highlights the unprecedented nature of this heat, noting the sheer volume of records broken. More than 19,800 daily temperature records were shattered, and 2,200 places set monthly highs. Experts predict that a brewing El Nino could intensify global warmth.
Scientists say a record-smashing March heat wave in the U.S. Southwest shows climate change is already driving more dangerous weather extremes. World Weather Attribution said Friday that the heat would have been virtually impossible without human-caused warming. Experts say extremes now hit more often, in odd seasons, and in unusual places. NOAA data shows a much larger share of the country sees extreme conditions than decades ago. An analysis by The Associated Press finds the U.S. breaks far more heat records than in past decades. One former FEMA official said disasters now fall outside old planning models and noted insurers pulling back.
El Nino warps weather worldwide. Meteorologists say the natural El Nino cycle is both adding to and feeling the heat of a warming world. A new study says a shift from a rare three‑year La Nina to a strong El Nino recently helped trap extra heat in the climate system. Study authors say between warming from greenhouse gases and that La Nina to El Nino change, it explains three-quarters of Earth's energy imbalance, which leads to extra heat. Warmer waters are also causing NOAA to shift how it calculates and labels this cycle, which likely means more La Ninas and fewer El Ninos.
Scientists say human-caused climate change added an average of 41 days of dangerous heat worldwide in 2024. The analysis from World Weather Attribution and Climate Central comes after a year likely to be the world's hottest on record. The heat scorched everywhere from cities in North America to West Africa to the Acropolis in Greece and even South and Southeast Asian countries. Some areas saw 150 days or more of extreme heat due to climate change. The scientists also said that climate change worsened much of the world's damaging weather throughout the year.
NOAA's Climate Prediction Center reports there is a 60% chance that a weak La Nina will develop this autumn and could last until March. La Nina is part of a natural climate cycle that can cause extreme weather across the planet. Northern parts of South America could see more rain than usual. Southern regions of the U.S. and parts of Mexico could be drier than average. The northern tier of the U.S. and southern Canada could be wetter than average.
