This study evaluates the current and future burden of cardiovascular disease (CVD) in Australia attributable to high temperatures. Using national health data and meta-regression modeling, researchers found that 7.3% of CVD burden from 2003–2018 was linked to heat exposure. Future projections under climate change scenarios suggest this burden could more than double by the 2050s—especially in the Northern Territory—if no adaptation occurs. The findings emphasize that rising temperatures will significantly intensify health risks, particularly for heart disease. Urgent climate adaptation strategies and emissions mitigation are needed to protect public health and reduce future cardiovascular impacts linked to extreme heat events.