I've had questions about Ironman St. George's water temperature and if there is a chance the swim could be canceled or modified. I've looked at rule sets for USAT and cannot find guidelines for minimum temps. There are ITU guidelines posted (see pages 14-15) but I'm not sure these rules apply to Ironman. If anyone out there knows the minimum temperature rules for IM, let me know. I'll do some more digging too.