Droughts and heatwaves are extreme weather events that can severely impact agriculture, water resources, and energy systems. When these two hazards happen at the same time called compound drought and heatwave (CDHW) events, and their effects are even more dangerous. This study focuses on these joint events across the United States, especially in the Southern Great Plains, over the last 40 years (1981–2022). Using detailed climate data, including daily temperature and rainfall observations, we identified when and where CDHW events occurred based on extremely hot temperatures and very dry conditions. We then studied large-scale weather patterns, such as high-pressure systems in the atmosphere (known as ridges), and found that CDHWs are often linked with persistent ridging over the Southern Plains. These patterns block rainfall and trap heat at the surface, creating ideal conditions for CDHWs. Dry soils and increased evaporation also make these events more intense and longer-lasting. We found strong relationships between upper-level weather patterns, reduced cloudiness, and hotter surface temperatures, showing that these features can serve as early warning signs. With CDHW events becoming more common and intense, this research supports the need for better planning in farming, energy, and emergency management