Zoos are the front line for endangered species. The "hottest" success stories include the California Condor and the Black-Footed Ferret, both brought back from the brink by zoo breeding programs.
Most zoos allow reusable water bottles. Look for refill stations to avoid paying "hot" premium prices for bottled water. zoo r hot
Map out the indoor, air-conditioned exhibits (like reptile houses or aquariums) and use them as cooling stations between outdoor treks. Zoos are the front line for endangered species