 There are things we expect from high temperatures, like sweat, increased irritability. There are things, however, that we just don't expect to hear about during a heat wave, like exploding soda cans at cruising altitude. Southwest Airlines told NPR that heat has warped some cans and caused others to burst when opened. And it seems to be unique to Southwest. The airline doesn't tend to transport the canned drinks in an air-conditioned truck.