Well, not 30 mi. daily. In fact, I went over my driving and calculated it out to be about 18 miles daily for the last three days. So, possibly up to 60 mi total since the alt-coolant belt fell off.

It's hit 120C once, and I then pulled over for a couple of hours and let it cool. I think it had hit 120C because most of the water had boiled off. I've kept the water full since that first day and it hasn't gone above 110 since then. It's hit 110 maybe thee times, for about 3-5 minutes each time until I pulled into my driveway.

Like I said, I still have one of the V-belts hanging there. I unfortunately can't get it back on because I don't have a wrench to fit up to the upper bolt on the alternator to loosen it up and get the belt around it. I'm waiting on a friend to bring me his wrench set, since I'm too afraid to take the car anywhere to buy wrenches.

What will be the first symptoms of a ruined engine from this situation?