In a Songfacts interview with Daniel Lanois
, he talked about the meaning behind this song. "'(Under the) Heavy Sun' talks about an imaginary place you might get to if you leave your ego hanging at the door and you walk in and you leave yourself open-hearted," he said. "It might be that magic place where you discover another dimension.
John [Shepherd], who sings the lead, sings, 'I know a place where the spirit rises from the ground, from hurt to glory.' Because in fast times and in hard times, it's easy to fall into demise thinking you can't wiggle out of a problem.
But if you manage to get yourself to this particular nightclub - and the setting could be in outer space or another dimension - when you enter that room you will find like-minded people who are also happy to be there and are looking to embrace the next chapter of life in an open-hearted way. It's just a fun ride in a '99 Cadillac – Johnny, who sings the lead, has a '99 Cadillac. We all get in the Cadillac, and we all want to drive to joys untold."