Traumatic Ten Minutes
The sun doesn't heat air, but it does heat objects. When those objects are inside an enclosed space, the temperature inside that space will rise accordingly. If that space is the inside of an automobile, it doesn't take long for the situation to become life-threatening for both human's and animal's.
This graph (from noheatstroke.org) illustrates a deadly reality. The most rapid rise in the above curve occurs in the first ten minutes of elapsed time! If you 'think' that it's OK to leave a child or animal in the car for 'just a few minutes', because 'I won't be gone long', it could be a fatal mistake. Too many people have discovered that fact the hard way.
/fl