From the upstairs pic, a branch appears to have some cupping. That's where the top of the branch goes out-of-round and develops a downward cleft. This indicates a tree that is dying. The trunk and main boughs begin to hollow out. The cupping is the tree's attempt to reinforce the boughs. An extended rain can add enough weight to the boughs to break them and, if more snap on one side, cause the tree to fall from losing enough counterweights.