House guest needs to go!

I have a friend who’s been in town for a week due to a family emergency. They have been staying at a hotel but decided to stay with us last night. I work from home and am swamped AND I have made this abundantly clear several times. I have said that I cannot be distracted and need to focus. I thought I had gotten through to them about this last night and they were going to head out this morning. Instead, they want to help me with my work. There’s nothing they can do to help me except to leave but apparently it’s not sinking in. I don’t want to hurt any feelings but I’m up against a deadline and I’m about to lose my freaking mind. Help me out here, peeps!