In the aftermath of a flood, the speaker looks around at a changed landscape and finds her own sadness reflected in it. The sunflowers, heads bowed, seem to be mourning something, or listening for Persephone crying underground for her mother. The line "There's nothing they can do" feels like a quiet admission of helplessness, and it hints that the speaker feels the same.
The poem then turns inward. She notes she is gaining weight again, as she did after her baby was born, but now there's no "excuse." The repeated "never" suggests a loss, perhaps of that stage of life, though the poem doesn't spell it out. Then come plain details: closed roads, gravel, a river with new channels. Everything has shifted.
The ending is odd and touching. A catbird, a bird known for mimicking others, "pretended to be somebody else." After upheaval, the speaker may long to do the same. The mood is subdued, wistful and watchful, with grief held back rather than shouted.