The interpretation of this narration is that if the person performing Wuduʾ does not interrupt it, but the drying is caused by strong wind or extreme heat, then they are not required to restart the Wuduʾ. However, if they interrupt the Wuduʾ and the earlier parts dry, they must restart it entirely, as explained. The Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, then said: "Similarly, if someone forgets to wipe their head but remembers while there is still moisture from their Wuduʾ on their hand, they should wipe their head and feet with that moisture. If they forget to wipe their feet, they should do so when they remember, using the moisture remaining on their hand. If there is no moisture on their hand but some remains on their beard or eyebrows, they may take enough to moisten their fingertips and use it to wipe their head and the tops of their feet, even if it is a small amount. However, if they remember what they forgot only after their Wuduʾ has completely dried, they must restart the Wuduʾ from the beginning." This is supported by the following evidence.
Commentary #38