Plumbing Problems

We are staying at my mom's house in Rio Rancho, NM but she is actually in Mesa, AZ where we will be flying tomorrow night. After Bill's shower today, the toilets overflowed...not just a "normal" overflow, they were gushing and no amount of plunging would stop it. We finally had to turn off the water. I think we used up every towel my mom owns to clean up the mess! So, I called my cousin, Jimmy, who happens to own a plumbing business but he said that he didn't have the equipment to work on sewer drains and suggested another plumber to call. I called and they said they'd be here in a hour (which would've been an hour ago and I still haven't heard anything). Didn't really want to be stuck here all day but, at least my mom's wireless internet is working.