There are dogs who can tell when a seizure is imminent, dogs who seem to know when their owners are close to home even when they are not in a car, or are riding in someone else's car. Dogs who manage to get their people out of the homes before danger happens. I can't give you particular names and dates only that these are all things that I've heard of on the TV or in periodicals. Other types of pets in the home often feel that the person is there to take care of them. A dog knows that because of its bark, teeth, and demeanor they can protect the person from harm.
Dogs have a totally different relationship than any other pet species have with their owners.
Horses typically are the easiest to talk with, they always seem to have a lot to say and can be very specific about what they want and need. Dogs, on the other hand, are very individual, some communicate easily, others are quite dull and slow. Some dogs are great at sending images of what they want to tell you, others can actually transmit poetry. Most dogs are very attached to their owners and have a lot to say about what's happening in their owners' lives and what they think their owners need. They'll often pick up on traumas or illness and will try to help an owner who's depressed.