Analysis of Bereft

Where had I heard this wind before
Change like this to a deeper roar?
What would it take my standing there for,
Holding open a restive door,
Looking down hill to a frothy shore?
Summer was past and the day was past.
Sombre clouds in the west were massed.
Out on the porch's sagging floor,
Leaves got up in a coil and hissed,
Blindly striking at my knee and missed.
Something sinister in the tone
Told me my secret my be known:
Word I was in the house alone
Somehow must have gotten abroad,
Word I was in my life alone,
Word I had no one left but God.