I saw this question on a You Tube financial channel. We don´t really have our fair share of natural disasters in Brazil but just by habit I keep R$1,000 Reals or less handy simply because that's what comes out of the ATM machine (max amount). My better half sometimes asks for contributions to pay the workers, change for her Brazilian Sorveterias or someone who shows up at our gate with items or food she really wants.
Roddie in Retirement