There's an active fire, visible smoke, or a gas smell. Get everyone out of the house first — do not try to fight a fire yourself or go back in for anything.
No fire, but this happened and it's the first time you're aware of it, or it's happened more than once — this is worth acting on now, not waiting to see if it happens again.
The immediate situation is resolved and you're thinking through longer-term safety. See the steps below.
This page is general safety information, not a diagnosis. Forgetting to turn off a stove once isn't automatically a sign of a serious problem, but a repeated pattern is worth taking seriously — this page can't tell you which one this is.
Everyone forgets things occasionally. A single incident, especially if your parent was distracted or unwell, may just be that. A repeated pattern — or this incident alongside other changes like confusion, missed medications, or getting lost in familiar places — is worth raising with their doctor and checking against Signs It's Time to Talk. If cognitive changes seem to be part of the picture, the Dementia Decisions hub covers what to do next.
The Home Safety Checklist covers kitchen safety specifically, and the Home Modification Cost Guide has real cost ranges if bigger changes — like an auto shut-off system — end up being worth it.