We find it interesting that Haderer has only used exclamation points a couple of times when titling these works, and when he has, he's used it when he's referring to environmental concerns. It must be a subject that's close to his heart. All good caricaturists use exaggeration to make their point. He did that earlier on when he had people frying steaks in the open air to highlight global warming. Now, this woman's taking a walk in the shade whilst her dog evaporates in the heat.
If the environment changes, we as humans can protect ourselves against it. We can change the way we dress, or the way we live, or even where we live. Many - probably even most - animals will not have that choice. If it's too hot for them to live, they will simply die. It's not just ourselves we have to take better care of the planet for. It's the ones who can't defend themselves, too.