Remarkable heatwave across Mexico & Texas. Temps 110+. Heat Index 120+. This map shows the upper level ridge “Heat Dome”. Maxes out at 4.5 sigma. This means in a normal “historical” climate it’s basically impossible. But climate change makes the impossible, probable. pic.twitter.com/LfokprTPZV

— Jeff Berardelli (@WeatherProf) June 20, 2023