The revelation of God is accompanied by a dramatic display where a sudden, immense light shatters the surrounding darkness to unleash destructive natural forces upon the wicked. This radiance shines down from a glowing source onto the physical world [מלבי״ם]. It is a brilliance that radiates directly from before God, driven by His deep desire to bring light and salvation [מצודת דוד]. These flashes of light are forms of divine revelation bursting forth from the hidden depths of heavy, dark clouds [ביאור שטיינזלץ]. On a symbolic level, this radiance represents the merit of good and righteous people who stand firm against the wicked. It is by their merit that disaster ultimately strikes the enemy [מאירי].
From within this intense light, the clouds sweep forward to hurl hail and flaming coals at the opposition [מצודת דוד]. This forward movement is not merely a passing storm, but a violent bursting and penetration, echoing the devastating hail that struck the Egyptians at the Red Sea [רש״י].
The simultaneous strike of hail and fire is a clear break from the normal laws of nature [אבן עזרא]. This miraculous blend, where the opposing elements of water and fire exist together in the air without extinguishing or melting one another, serves as a powerful testament. It proves that God is present everywhere and holds absolute control over creation, operating far beyond the limits of the natural world [אלשיך]. Ultimately, the purpose of this unnatural phenomenon, striking like deadly, glowing iron, is to plant a deep fear and terror in the hearts of the enemies [אבן עזרא].