The present continuous can refer to the future. It shows that we have already decided something and usually that we have already made a plan or arrangements:
[talking about plans for a tour by a rock music group]
The band is visiting Denmark next May.
I am taking the train to Paris tomorrow.
We don’t use the present continuous when we predict something. Instead, we use going to or will:
It’s going to rain again soon.
It’s raining again soon.