Europe is experiencing a significant heatwave driven by a high-pressure weather system dubbed a “heat dome.” This phenomenon is caused by what meteorologists call an Omega block, a stationary wave in the upper atmosphere resembling the Greek letter Omega. The Omega block effectively traps hot air in place, preventing cooler systems from moving in and intensifying temperatures. This particular pattern is contributing to record-breaking heat across the continent, impacting public health and raising concerns about wildfires. The stability of the Omega block is prolonging the heatwave, with no immediate relief expected in affected regions. Experts explain this type of weather pattern is becoming more frequent and intense with climate change.