In this Poem, "Heat" by H.D., the speaker -from whom we don't know much- describes an Imagist poem - a really precise, tight and sonically dense poem. We can find some sounds repetitons -'heat' and 'rend' which are present in all over the first stanza; filled with alliteration (the first stanza in 'fruit cannot fall') and consonance (the third stanza in 'cut apart the heat'). All this resources create short, concise and pretty intense evocative images, which means that it doesn't have a regular rhyme scheme or meter.
The poem is not explicit about setting, but what we do know is that the weather is pretty hot. The speaker refers to a hot, humid and stifling environment which leads the audition to call on the wind for relief.
For all these clues descripted, I can asure this poem talk about and ask for 'a breeze' that, as I previously said, would bring relief to the hot weather.