Before You Leave Mom Alone at Dusk, Size the Gap to Her Hardest Hour

You need to pick up groceries. The trip should take less than an hour. Mom has been comfortable at home all afternoon, and you are trying to decide whether she can stay alone until you return.

Do not answer that question with a general label such as “fine alone” or “needs supervision.” Size the decision to this particular gap: when you will leave, what Mom usually does then, which doors she can reach, and how quickly someone can come if the evening changes.

The National Institute on Aging says many people in the earlier part of dementia continue to manage everyday activities, while also recommending regular contact, home safety changes and a plan for getting help. The Alzheimer’s Association says the support a person needs can change as dementia progresses. That means yesterday’s easy afternoon does not settle tonight’s dusk hour. (National Institute on Aging, Tips for Living Alone With Early-Stage Dementia; Alzheimer’s Association, If You Live Alone.)

Name the exact gap

Write down the time you would close the door behind you and the latest time you would be back inside. Include the walk to the car, traffic, waiting and the chance that one errand becomes two. If your plan only works when every minute goes right, it does not fit the real trip.

Then compare that gap with Mom’s own evening. Does she begin looking for her coat before you would return? Does she ask when she is going home? Does she follow people who leave? Does she need help finding the bathroom, answering the telephone or settling when the room grows dim?

The Alzheimer’s Association recommends identifying the time of day when wandering is most likely and planning support for that period. It also lists restlessness, repeated movements, talk about going home and trouble finding familiar rooms among signs that someone may become lost. (Alzheimer’s Association, Wandering and Dementia.)

Use what actually happened in this house. Check several ordinary evenings and record the first sign that Mom’s attention turns toward leaving. Your usable gap ends before that sign, not when dinner starts or the sun disappears.

Check what the house asks her to manage

Walk through the hour from Mom’s chair. Can she reach the bathroom without choosing between similar doors? Is the route lit before the room becomes shadowy? Can she get water without using an appliance that now confuses her? Will a ringing telephone, delivery or visitor pull her toward the entrance?

Look at every usable exit, including the door from the house into the garage. Check what happens when Mom turns each handle. A chime or alert may tell someone that a door opened, but it only helps if a named person receives it, notices it and can respond. The National Institute on Aging suggests door alerts, secured exits and identification as parts of a wandering safety plan. It also says not to leave someone with a history of wandering unattended. (National Institute on Aging, Coping With Alzheimer’s Behaviors: Wandering and Getting Lost.)

Keep emergency escape in the plan. The Alzheimer’s Association cautions against locking a person inside the home. If an added lock is part of your setup, everyone who may need to get out or enter in an emergency must know how it works. (Alzheimer’s Association, Wandering and Dementia.)

Separate reminders from rescue

A note saying “I will be back soon” may comfort Mom when she recognizes the message and trusts it. It cannot bring her back from the sidewalk. A camera may show you that she reached the door. It cannot stand beside her while you drive home.

For every support you plan to use, ask one plain question: does this help Mom complete the hour, or does it merely tell me that the plan has failed?

Write down who will receive each alert, how they will know it concerns Mom, whether they can enter the house and how long it will take them to arrive. Call that person before you leave. “Keep an eye on your phone” is not a handoff. “If the front-door alert arrives, call Mom, then go to her door if she does not answer” is clear enough to follow.

The National Institute on Aging recommends identifying people who can visit regularly and serve as emergency contacts. It also notes that trusted neighbors may notice wandering or someone who appears lost. (National Institute on Aging, Tips for Living Alone With Early-Stage Dementia.)

Use a tabletop test, not a secret trial

You do not need to leave Mom alone to discover the weak places. Sit nearby while another person walks through the proposed gap with you.

Start the lighting as it would be while you are gone. Let the usual telephone calls, television and household sounds continue. Check whether Mom can find the bathroom, a drink and her familiar place to sit. Watch what happens when the helper steps outside and closes the door. End the exercise if Mom becomes unsettled or starts looking for the person who left.

This is not a test Mom has to pass. You are testing whether the plan fits her. If it does not, shorten the gap, move the errand, bring Mom with you or arrange for someone to stay.

Know what makes the answer no

Do not leave Mom alone during this window if she has already walked away or driven away without someone knowing, if she cannot use the telephone or another agreed way to call for help, if she regularly tries the door at this hour, or if the backup person cannot arrive promptly. The National Institute on Aging specifically advises against leaving a person with a history of wandering unattended. (National Institute on Aging, Coping With Alzheimer’s Behaviors: Wandering and Getting Lost.)

A sudden change is also a reason to stop and reassess. If Mom is much more confused, sleepy, unsteady or unlike herself, the old plan no longer answers the question in front of you. Contact the person who helps manage her care and describe exactly what changed.

Leave one small plan

If the gap fits, put one page where the responsible people can find it. Include your departure and return times, where Mom is likely to sit, the first sign that she may head toward the door, the exits that must be checked, who receives alerts and who can enter the house. Add a clear point when the backup person comes over instead of continuing to call.

Review the plan whenever Mom’s route, evening behavior, house or available helpers change. The answer is not “Mom can be alone.” The useful answer is narrower: “This particular gap fits tonight, in this house, with this person ready to respond.”

For the government and major-nonprofit material behind this guide, see Sources. If dusk is already becoming hard to manage, follow Start Here: Dusk to Morning, in Order.