Kerala floods: Why clear your fridge after a power outage? Food Safety expert explains

Heavy rain and storm-induced power outages have become common across many regions in Kerala, leaving households without electricity for hours. While blackouts are a minor inconvenience for some, they pose a significant health hazard for food preservation. Once your refrigerator loses power, temperatures drop rapidly, creating a perfect environment for bacterial growth. Can you safely eat food that has sat in a power-deprived fridge? Santhosh Kumar, a Food Safety Officer, shares essential guidelines on how to handle refrigerated food during a blackout to prevent food poisoning.

Is your food still safe?
According to food safety studies, perishable foods must be discarded if the refrigerator temperature rises above 5°C for more than four hours. If the door remains closed during a power outage, a standard refrigerator can keep food safely cold for up to four hours. However, your freezer is slightly more resilient: a fully stocked freezer can hold its temperature for up to 48 hours, while a half-full one can keep items safe for about 24 hours.

The danger of packaged and processed foods
Many of us rely heavily on packaged and processed meals, often stocking up on them and simply reheating them when needed. However, these convenience foods spoil incredibly fast when the cooling stops. Eating these items after they have been exposed to room temperature can lead to severe food poisoning. During the monsoon season, it is best to avoid the temptation to overstock your fridge. Instead, buy only what you need and prioritise cooking fresh meals.

The expiry date trap
A common misconception is that packaged food is safe to consume as long as it is within its expiry date, regardless of the power cut. This is a highly dangerous assumption. Every packaged item requires a specific temperature range to remain preserved. Once the power goes off and the fridge warms up, chemical reactions trigger rapid bacterial growth, rendering any printed expiry date completely meaningless. Do not rely on dates if the cold chain has been broken.

Handling fresh produce
Fresh vegetables and whole fruits are generally more resilient than processed foods and will not spoil immediately when the power goes out. However, you must be extremely cautious with pre-cut fruits or vegetables. If sliced items are kept in a warm fridge, they can ferment, attract bacteria, and quickly spoil any surrounding whole produce.

High-risk foods to discard immediately
Certain foods are highly susceptible to bacterial contamination and must be thrown out if the power has been off for over four hours. Dairy products like milk, yoghurt, cream, soft cheese, and paneer are top of the list. Similarly, never reheat and consume cooked rice that has sat in a warm fridge. Other high-risk items that should be discarded include cooked meats (chicken, beef, mutton, duck), seafood (fish, prawns, squid), boiled eggs, mayonnaise, custards, egg-based salads, traditional curries (sambar, fish curry, chicken curry, dal), stews, cut fruits (such as watermelon, papaya, and pineapple), salad dressings, soy products, baby food, prepared infant formula, and open fruit juices.

What remains safe to consume
Fortunately, some kitchen staples can survive a blackout without spoiling. Items like butter, jam, jelly, pickles, soy sauce, vinegar, unopened soft drinks, bread, peanut butter, and whole, uncut fruits and vegetables remain safe. Additionally, if you notice that frozen foods in your freezer still contain visible ice crystals, they are safe to refreeze or cook immediately.