Poor planning on your part does not make an Emergency on my part. Always make sure you have at least a half case on hand at all times. Always buy in case lots, far cheaper than by the bottles.
Always be aware of when store closings are. Always be aware of your inventory levels. Always stock up before Holidays. Allways stock up before family and friends are coming over,
The only acceptable time to run out is the last glass before going to bed when the stores are open the next day.