The natural phenomenon of seasonal streams, which shift dramatically with the changing weather, paints a vivid picture of sudden environmental transformation. As the seasons turn, the water in these riverbeds undergoes a severe change. The primary approach among commentators is that this shift is driven by the scorching heat of the summer sun [רש"י, מצודת ציון, רלב"ג, מלבי"ם]. Under this intense heat, the waters are completely cut off, drying up and vanishing from the landscape [מצודת דוד, מצודת ציון, רלב"ג, אבן עזרא, שטיינזלץ]. Some describe this process as the water shrinking and rapidly retreating from its place [רש"י]. Alternatively, it captures the moment when solid blocks of winter ice begin to thaw, melting away the frozen bonds that once held them together [מלבי"ם].
In stark contrast to the idea of summer heat, another perspective suggests the exact opposite, framing the process around the bitter cold of winter. In this view, the waters bind together, freezing into a single, solid block of ice [אבן עזרא, אלשיך]. A third approach steps away from temperature changes entirely, explaining that the imagery simply describes the rushing flow of rainwater racing down the stream bed [רמב"ן, רלב"ג].
The conclusion of this thought reinforces the same underlying idea through different imagery [מצודת דוד, אבן עזרא]. When the intense heat finally arrives, the waters fade away entirely. This fading represents a complete destruction and disappearance, much like a candle being snuffed out [אבן עזרא, שטיינזלץ]. Others frame this disappearance more actively, noting that the waters seem to jump, detach, and flee from their location in a sudden rush [רש"י, מצודת דוד, מצודת ציון]. A final, vivid interpretation suggests that when the warmth returns, the heavy snows in the mountains thaw all at once. This sudden melt causes the once-frozen stream to be violently uprooted and washed away in a massive, overwhelming flash flood [אלשיך].