Following a series of symbolic actions performed by the prophet, God reveals their harsh practical meaning. A heavy famine and siege are destined to strike Jerusalem. The command given to the prophet to eat and drink in strictly measured amounts serves as a living sign for the Israelites, warning them of the extreme distress that is approaching.
The primary approach among commentators is that bread acts as a fundamental support for human survival. Just as a physical staff holds up a weak and frail person, bread serves as the support of life that people rely on to be satisfied [רד״ק, מצודת ציון]. Breaking this support in Jerusalem signifies the arrival of a severe famine [מצודת דוד], mirroring the ancient curse in the Torah that warns of a time when the support of bread will be broken [רד״ק].
Because of this famine, the residents of the city will be forced to ration their food by exact weight. Water will be measured out using a specific vessel designed for precise volume, reflecting a reality of extreme shortage and deprivation [ביאור שטיינזלץ]. This physical suffering will be accompanied by deep emotional trauma. People will eat in a state of constant worry, consumed by the fear and anxiety that their limited supplies of food and water will completely run out [רש״י, רד״ק, מלבי״ם, מצודת דוד].
Beyond the daily anxiety, the people will experience a deeper psychological collapse. Most commentators explain this condition as a state of intense panic, fear, and mental bewilderment [רד״ק, מצודת דוד, מצודת ציון]. However, another approach understands this emotional ruin as a profound sense of depression and complete despair [ביאור שטיינזלץ].