and mayor turner's great relationship with the faith community. we have people at a convention center, about 2500 people there. we've had 2000 rescue missions with the police department itself. and we have about 230 left. and we're just hopeful that sometime today we'll be able to finish all the rescue missions and then we'll go toward a search mission. you see if there's anybody inside the homes flooded to the roof. >> chief, given the sprawl of the urban area of houston and the size of your force and the condition of roadways and flooding, talk a bit about the degree of difficulty and the logistics of rescue operations. >> it's really tough. because roads have been impassable. our police cars, we've had about 30 of them that have been damaged or destroyed by flood