river. at one point, the rushing water swept a rescuer downstream. luckily everyone survived. the threat of these intense waters bringing more mud slides is the biggest fear in california right now. areas once scorched by wildfires have nothing to hold back the debris. let's bring in mark gillalducci from berkeley, california. what is the main concern right now? how are you getting people out of harm's way from the potential mud slides? >> the most important factor right now is the ongoing consistent rain. at times, the rain is going to be very heavy. we've identified those areas that could potentially be impacted by mud flows. we know where the burn scars are from this past summer. we have done mandatory evacuations in all of those areas where they potentially