Short Answer 
To handle a gas stove incident, first turn off the stove to prevent gas accumulation. Avoid using any electrical appliances to prevent sparks, and ventilate the area by opening windows and doors; if you smell gas or feel unsafe, evacuate and contact emergency services from a safe place.
Step 1: Turn Off the Gas Stove
Immediately turn off the gas stove by turning the knob to the ‘off’ position. This is the most crucial step as it prevents gas from accumulating in your home, which could lead to a potential explosion or fire if ignited.
Step 2: Avoid Sparks and Electrical Appliances
Refrain from using any electrical appliances, including lights, that could create sparks. Even simple actions can pose a risk, so it’s vital to keep the area free of potential ignition sources until the gas is adequately ventilated.
Step 3: Ventilate the Area
Open all windows and doors to allow any accumulated gas to escape efficiently. If you notice a strong smell of gas or feel unsafe, evacuate the area immediately and contact emergency services or your gas company from a safe location to report the situation.