It says in Genesis 19 that Lot had escaped to the city of Zoar, and the overthrowing of Sodom and Gomorrah did not begin until the next morning, when the sun rose. By this time, Lot was already safe with his family in the city of Zoar.
Yet it then invokes imagery that appears to show them running, for it says Lot's wife was behind Lot when she looked back, and was turned into a pillar of salt. The questions are:
1) Were they in motion, running, or already safe in the city? The rest of the context makes it abundantly clear nothing started until they were safe in the city of Zoar already.
2) What does "looking back" mean? Does this mean anyone in the city of Zoar who looked at what was going on was also turning into pillars of salt?
3) How was Lot's wife turned into a pillar of salt? Not through the rain from the sky, surely, because the place they were in was supposed to be untouched by this.