The ultimate downfall of a wicked person is absolute, leaving no part of his life untouched. His punishment reaches from his most carefully guarded secrets to the last remnants of his family and belongings. A person may try to conceal his corruption and theft in the shadows, but a profound darkness of consequence is stored away specifically for him. The primary approach among commentators views this as a direct response to hidden sins; though a person hides his actions, his punishment is securely reserved [רלב״ג, שטיינזלץ]. Eventually, God will shine a light into that darkness, exposing the hidden deeds for all to see [מלבי״ם]. Others suggest that this darkness targets the person's hidden wealth, representing a gloom of troubles destined to wipe out his secret fortunes [רש״י, מצודת דוד]. Alternatively, the darkness represents unseen dangers lurking in secret places, threats the wicked person is completely unaware of and powerless to avoid [רמב״ן]. A unique perspective sees this darkness as a future of grinding poverty awaiting the person's orphaned children. Because he showed no mercy to others during his life, his descendants are met with destitution in an exact measure-for-measure response [אלשיך].
When the punishment finally strikes, it is likened to a fire that burns without needing to be fanned. There are differing views on the nature of this flame. One explanation is that it is a low, slow-burning fire. Rather than ending the person's life quickly, it burns with a low intensity to prolong his suffering, ensuring he endures a lengthy agony before his end [אבן עזרא, מצודת דוד, שטיינזלץ]. Conversely, another view understands this as a supernatural blaze that requires no human effort to sustain. This could be an otherworldly punishment like the fires of Hell [רש״י, אלשיך], an eternal flame that can never be put out [רמב״ן], or a pure, elemental fire entirely unlike the physical fire we know in this world [תקוות אנוש, שטיינזלץ].
The devastation does not end with the individual, as complete ruin comes to whatever remains in his home. The destruction here is not a mere misfortune but an absolute shattering [מצודת ציון, רלב״ג, מלבי״ם, שטיינזלץ]. This profound breaking strikes the survivors left behind, namely his wife and children [מצודת דוד], as well as any visible property that was not hidden away [מלבי״ם]. Others maintain a simpler understanding, noting that disaster will inevitably fall upon anyone who stays in his home [רמב״ן, תקוות אנוש]. A Midrashic tradition connects this total devastation to the people of Sodom. In this context, the sole survivor in the tent refers to Lot; yet even his wife, who initially escaped the destruction, was ultimately overtaken by disaster and turned into a pillar of salt [רש״י].