Alzheimer’s caregivers should be cautious about a patient’s access to knives, appliances and electrical devices. A patient with AD may no long remember how to safely operate common household appliances, power tools, or gardening equipment. To help ensure safety, try to distract the person from working in the kitchen or other areas alone, or encourage the person to work with you when you’re working or preparing food. Bedtime precautions such as locking up knives, taking the knobs off stoves can prevent accidents. If the person cannot see a device or appliance, it may not pose a problem. Also you might want to turn of the gas and electricity in areas that could be dangerous, and perform monthly checks of fire extinguishers and smoke alarms.
(Source: Alzheimer's Association)