People say that if you find water rising up to your ankle, that’s the time to do something about it, not when it’s around your neck.

Achebe’s image of rising water frames crisis as something that becomes lethal through delay. The proverb-like phrasing stresses early recognition and timely intervention: when danger is still manageable (“ankle”), action is possible and relatively low-cost; once it is overwhelming (“neck”), options narrow and survival itself is at stake. In Achebe’s broader moral and political outlook, such a warning often applies to societies that ignore corruption, injustice, or authoritarian drift until the damage is entrenched. The line therefore functions as a critique of complacency and a call for vigilance—personal and civic—before problems harden into catastrophes.