The children have been playing in the mountains for a long time. Why haven't they come back? I am really worried about them.
Look at the sky. Black clouds are gathering and strong winds are blowing. It seems a heavy rain will fall soon.
They haven't brought anything to protect themselves. They will be caught in the rain I think.
Don't be worried too much about them. Anyhow, they're old enough now. They ought to be able to take care of themselves.
I'm afraid they will catch a cold if they are caught in the rain. You see it's a little cold now.
Shall we bring some umbrellas or raincoats for them?
How can you find them since we don't know where they are?
Well, we can only stay home and wait for them.