text: Most simulations here project a general increase in mean streamﬂow in most of the basins 
  examined, but with a number of notable exceptions in the tropics. While ﬂows in the Ganges are 
  consistently projected to increase by 30–110% at 2°C, Amazon ﬂows could either increase by 3% 
  or decrease by 25%. Ensemble-mean changes in river ﬂow often do not give a full impression of 
  the magnitude of changes that may be possible, so adaptation planning in particular should not 
  rely on ensemble-mean projections and instead consider a range of outcomes. The seasonal low 
  streamﬂows also increase in many basins, but not as many as for the mean ﬂows—many basins 
  see decreased low ﬂows in some or all projections. 
  
  Broadly, changes in weather extremes at 1.5°C global warming could be estimated by scaling- 
  back the impacts at 2°C, if this is done with individual ensemble members rather than the 
  ensemble mean. However, this was not always the case for impacts that depend on more complex 
  process or interactions between more than one climate variable, such as run-off and an indicator 
  of vulnerability to food insecurity. 