the threat of all kind of toxins in the water. we ve touched on tha ed oed on times. seeing the projected 103 heat index at 3:00 in houston doesn t make it any easier. derek van dam live in the cnn weather center. thanks. the cleanup effort facing houston is mammoth. volunteers across the region who helped with rescue and shelter operations now throwing themselves into the cleanup challenge. joining on the phone, john stephens, senior pastor of the united methodist church in houston. good morning. tell us what you re doing to get out there, not just to rescue but to help start this cleanup process. caller: yes, we ve been out since sunday doing water rescues at that point. that kind of finished up on wednesday late afternoon. on thursday and friday i don t even know what day to say to be perfectly honest with you, sorry. we started putting our staff