Lifeguards in California have been busy this summer due to repeated heat waves. The high temperatures have led to an increase in rescues, with thousands of people being saved. The heat waves have been a significant factor in the lifeguards' busy summer, with many people likely seeking relief from the heat at beaches and other waterways.

Further information on the situation can be found in the Los Angeles Times, which has reported on the lifeguards' efforts to rescue thousands during the high surf and heat waves this summer.