My heart feels restless due to the heat, as if my chest would split open with a gust of wind.

This couplet captures a feeling of overwhelming, almost unbearable internal heat—a metaphor for intense emotional distress or longing. The poet feels that the pressure building inside him is so immense that he wishes for a physical release. He yearns for the wind to literally tear open his chest, offering temporary relief from the suffocating emotional burden. It’s a powerful use of hyperbole to express deep yearning.