The drought conditions that all will be blasted with will loud for sure. Then you have to remember the Chehalis Basin and tribs are rain driven so low summer flows are normal. The difference in CFS from average to record low is just not that substantial. Other than adult returns timing being altered sometimes it is the rearing areas that take the hit. While the CFS overall may not be that great the over summering and rearing areas do take a hit. Best I can do to explain is beaver ponds which are coho reaing habitat. In a real dry summer the pond levels drop even with constant repair by the furry guys. I have seen them drop in flows and depths but hanging in. The old timers could remember a year that some ponds went dry in the Satsop sub basin and I imagine it was the same other places. For us in the basin it is when it rains in the fall as ground water drops. You get into late November like the early 90s before it rains it is ugly for everything fish.