Record-breaking heatwaves across the US are causing soda cans to explode on Southwest Airlines flights, resulting in injuries to about 20 flight attendants, including one who required stitches. The incidents primarily occur on flights from hot locations such as Phoenix and Las Vegas. Southwest Airlines officials attribute the problem to how they store and load drinks, which are often exposed to external heat as the airline does not use air-conditioned catering trucks. Measures being implemented include using coolers, monitoring temperatures, and testing air-conditioned trucks. The airline is also in discussions with Coca-Cola to explore alternative can designs. Despite these efforts, the issue remains a significant concern for the airline.