Wilder believed the real significance of a play resided in the good use of the stage, and the way to interact and make full effort to project the story without the need for a big scenery and props; then leave the rest to the audience so they could imagine everything else.
Rain symbolizes multiple things depending on the context in which it appears, but most commonly connotes sadness, rejection or despair.
In the political cartoon, the cartoonist thinks opening the beaches is not a good idea. He thinks that coronavirus will strike as soon as the beaches are open since people will be close to each other. He is persuading us to not go to the beaches, or not to open them at all.
