Is nbc nightly news with brian williams. Good evening. Youre about to see and hear what can happen when a months worth of rainfalls in one 24hour period. Weve shown you the effects of just one slowmoving weather system all this week. Its spawned tornados, left behind a death toll of 35, driven thousands out of their homes and flash floods. Watch what happened in baltimore as a retaining wall was feared to be giving way due to pressure behind it and someone started shooting video. Oh my god all vehicles lost, as their owners looked on. That was just one outbreak of flooding in the state of maryland. All together, this weeklong weather outbreak affected almost half the country, over 20 states. Some have seen recordbreaking rainfall. We begin with peter alexander. Peter, good evening. Reporter brian, good evening. Days ago this was a quiet creek but as you see now, its a rushing river. After several states collected historic rain totals in this massive storm. Tonight there is a hole in th