I'm so sorry. I've been away from the boards and am just seeing this. I'll add my thoughts and prayers to everyone else's, but also some advice.
PLEASE HAVE THE POLICE OR ONE OF THE AGENCIES HELPING FIND A VOLUNTEER K9 SEARCH AND RESCUE TEAM AS SOON AS POSSIBLE. These teams are everywhere (my husband does this) and they are effective and eager to help - but someone has to ask them, as there are often rules or laws about them just "showing up" on a scene.
Thinking good thoughts for a happy ending.