Gemara Shabbos says that originally one was allowed to bathe on Shabbos in pre-heated bath-houses.
However, (in short) due to the fact that the bath-house directors would violate Shabbos (by heating up the water on Shabbos), the Rabbis forbade all forms of bathing (including hot-water bathing, steam bathing, and Chamei Teverya bathing).
However, some time later the Rabbis canceled the decree against Chamei Teverya, since people wouldn't be able to survive Shabbos without some form of bathing.
I don't understand. There is one hot spring in Israel (TTBOMK), which is in Teverya. Somehow, the rest Jews in the rest of Israel were able to survive without bathing.
Why couldn't the Teveryans?