Will cats go hungry if they don’t come up under a tree? A cat will become hungry if it doesn't come down a tree, but it won't die directly. It can satisfy its appetite by preying on small animals, mosquitoes, cockroaches, etc.
Cats cannot come down a tree and will starve to death over time. Cats have no food or water in the tree and will die over time.
If the cat is trapped in a tree and cannot come down and cannot be able to rescue him, you can call the 119 emergency number (the grassroots fire brigade will participate in social assistance without affecting normal duty readiness).
You can also search for high-altitude cleaning and find "Spider-man" to rescue them. They have professional equipment and technology, which is relatively safe and secure.