1)
What does Hashem's word melt?
1.
Rashi: The [ice that is like] crumbs.
2.
Radak: The snow, frost and ice mentioned above.
3.
Malbim: The decree.
2)
How does Hashem's word melt them?
1.
Radak: The sun's heat, or rain, melts them.
2.
Malbim: It retracts the decree and nullifies it. Influence will descend like initially.
3)
What Ru'ach does He send?
1.
Rashi: The western wind. It ceases the ice, "and water flows."
2.
Radak #1: He sends wind from the sea to bring rain, to melt them.
3.
Radak #2: The Ru'ach scatters [what is frozen]; it is not together, so it melts, and water flows.