<p>Climate change has led to increasingly frequent heatwaves, posing challenges to the allocation and management of urban resources to support normal urban operations. However, the current spatiotemporal distribution characteristics of heatwaves and their relationship with regional resource consumption remain insufficiently understood. Therefore, this study portrays the spatiotemporal distribution of heatwaves in China and the United States from 2010 to 2022, then uses Spatial Durbin Model to test the relationship between heatwaves and resource consumption and conducts a comparative analysis. The results show that the frequency and intensity of heatwaves are spatially clustered and show a fluctuating upward trend. The heatwaves in China only have a spillover effect on urban water and gas consumption, while the heatwaves in the United States have a direct positive effect on water and electricity consumption and a direct negative effect on gas consumption. In addition, the heatwaves in the United States also have a spillover effect on electricity consumption. This study provides insightful suggestions for policymakers to formulate resource management strategies during heatwaves and reduce urban risks caused by climate change, thereby ensuring sustainable urban development.</p>