The side door is the entry most families never test. The front door gets the attention, the garage gets the remote, and the side door becomes the one a caregiver, an aide, or an emergency crew needs at the worst hour. Before anyone is handed a key or told to use that door, walk the route your father actually takes, at night, with a flashlight.
Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.
Walk the route he uses
Start where he really goes out, not where the plan says he goes. Note which way the door swings, whether there is a step or threshold, what the light does at the top of the step, and whether a storm door or screen door blocks a clean entry. Time how long it takes you to get from the car to the inside with the door unlocked and then locked. A path that works at noon can fail at two in the morning.
Check the lock and the key
Find out whether the side door has a deadbolt, a knob lock, or both, and whether they open with the same key. Confirm the lock can be opened from outside with a key and from inside without one. Ask whether a person without a key can get in without breaking glass. List who holds keys today, and whether any of them has moved away or stopped answering the phone.
Ask the person offering the plan
Ask what the access is for: daily visits, night checks, or emergencies only. Ask the caregiver or helper what they will do if the side door key is lost, if the lock jams, or if your father does not come to the door. Ask who they call first. Get the answers in writing, and make sure the plan names the door, not just the house.
Compare the options before you commit
Compare three arrangements: a key held by a named person, a lockbox that responders can open with a code, and a plan where the door is left unlocked during scheduled visits. Each fails differently. A key fails when the holder moves. A lockbox fails when the code is shared too widely or never tested. An unlocked door fails when a stranger walks in. Choose the one whose failure you can live with, and write the backup down.
If the answers point to a gap you cannot close alone, start with Local Help in St. Louis.
Your next move tonight: walk the route with a flashlight, time it, and write down three answers: who has the key, who gets called first, and what happens if the lock jams.