MBR Sewage Treatment Plant MLSS

We have received a lot of rainfall in the geographical area where the MBR treatment plant is located. The FOG pond and equi tanks are exposed and have received a lot of dilution from the rainwater. BOD loading is 75kg/BOD, question is can the dilution affect the MLSS and inturn affect the filtation activities? If so how do we rebuild MLSS and maintain good MLSS in these times?