that number could continue to rise as more than 170 people have been reported missing in washington state after saturday s deadly mud slide. search and recovery efforts continue today. it s the fourth day. for the latest from arlington, washington, i m joined by jennifer bjorklund. reporter: national guard is flying in to help and they are welcoming neighbors and volunteers and people that have been frustrated the last few days to help go through the rubble but they had to make sure the ground was stable enough. it s not that stable as far as the muck goes because the mud that is seeped into the mud slide area is like a wet concrete and it s very difficult to navigate. they are welcoming volunteers to help come in and search for neighbors. some 200 people lived in that slide zone. and the list, the working list,