The Jordan Rift Valley drops 1,411 feet below sea level to form a basin of trapped heat and heavy air. Summer temperatures regularly exceed 110 degrees Fahrenheit. Seismic faults run along the valley floor. Volcanic vents and deep fissures release highly flammable gases into the atmosphere. Early scribes attributed these frequent tectonic upheavals and sudden fires to the wrath of Yahweh as he punished local populations.
These natural disasters provide the physical setting for Genesis chapter 19. The text places the destruction of Sodom and Gomorrah somewhere around 1900 b.c. First-century historians including Tacitus documented a severely scorched landscape in this exact region. In the narrative, two messengers enter the town gates at evening to warn the patriarch Lot of an impending catastrophe. The town residents surround the house and demand the messengers come outside, sparking a violent standoff.
The messengers blind the hostile crowd and pull Lot away from the doomed settlement. A catastrophic event immediately follows, with burning sulfur consuming the towns. This description mirrors the eruption of subterranean bitumen pockets and flammable gases along the fault line. Lot escapes with his family, but his wife stops to watch the inferno and turns into a pillar of salt. The shores of the lake contain numerous natural salt towers shaped by wind and evaporating water.
A barren landscape preserves the memory of human ruin far longer than a fertile valley.
This memory of ruin drives the survivors upward into the desolate mountains. Lot retreats to a remote cave with his two daughters, far from the toxic smoke and leveled settlements. Believing they are the last people left on earth, the daughters conspire to continue their lineage through their father. They produce two sons who eventually become the patriarchs of the Moabite and Ammonite nations. The narrative uses the trauma of a geographical disaster to establish the troubled origins of Israel's bitterest neighboring rivals.