"To survive the summer" means to successfully make it through the hotter months and all the challenges it brings, such as extreme heat, sunburn, or other difficulties that may come with this time of year. Full definition
Ice thickness is an important factor which allows us to assess the health of the pack and its ability to survive the summer melt. (earthobservatory.nasa.gov)
Obviously they would be well suited for pets living in warmer climates or to help your pup survive the summer heat, but they also have additional health benefits that you many not realize. (topdogtips.com)