Heatwave Food Safety Tips: Avoid These Common Fridge Mistakes

Learn how to store food safely during a heatwave. Discover expert tips to prevent food poisoning, keep your fridge at the right temperature and protect your family.

Food Hygiene

Article

Woman reaching into a fridge to take out a lemon

As temperatures rise during the summer months, so does the risk of foodborne illness. While many people know to refrigerate perishable foods, one common mistake often goes unnoticed: overloading the fridge.

During a heatwave, your refrigerator works harder to maintain a safe temperature. If it's packed too full, cold air can't circulate effectively, meaning some foods may not stay cold enough to prevent harmful bacteria from multiplying.

Combined with other common food storage mistakes, this can significantly increase the risk of food poisoning.

Why hot weather increases food safety risks

Bacteria thrive in warm environments. During hot weather, perishable foods such as meat, poultry, fish, dairy products and cooked leftovers can reach unsafe temperatures much faster than they would during cooler months.

Even short periods spent outside of refrigeration can allow bacteria to multiply rapidly.

Katherine Pavling, Head of Product at Virtual College, explains:

"Hot weather increases the risk of food going off more quickly, so it is important to take extra care with storage and hygiene. Perishable foods such as meat, fish, dairy and cooked leftovers should be kept refrigerated at 5°C or below, and should not be left at room temperature for long periods. As a general rule, food should not be left out for more than two hours, or one hour in very high temperatures."

The common fridge mistake many people make

When stocking up for barbecues, picnics or family gatherings, it's easy to fill every available space in the fridge.

However, an overcrowded fridge prevents cold air from circulating properly, creating warmer areas where food may not be kept at a safe temperature.

To help your fridge perform efficiently during hot weather:

Keep your fridge between 70–80% full
Avoid blocking air vents
Store raw meat separately from ready-to-eat foods
Check your fridge is maintaining a temperature of 5°C or below
Regularly check door seals are working correctly

These simple steps can help keep food fresher for longer while reducing the risk of bacterial growth.

Don't put hot food straight into the fridge

Another common misconception is that leftovers should be refrigerated immediately after cooking.

While food should never be left out for extended periods, placing steaming hot dishes directly into the fridge can actually raise the appliance's internal temperature, affecting other stored food.

Katherine Pavling advises:

"Always avoid placing hot food directly into the fridge, as this can raise the internal temperature and affect other stored items, especially in hot weather, and should be cooled first. The guideline is one to two hours cooling time, but in very hot weather conditions, aim for closer to one hour."

Once cooled, transfer leftovers into shallow containers and refrigerate promptly.

Food safety when travelling

Summer often means picnics, outdoor events and long journeys with food.

Without proper temperature control, chilled foods can quickly become unsafe.

If you're transporting food:

Use insulated cool bags or cool boxes with ice packs
Avoid leaving food in a hot car
Refrigerate chilled items as soon as possible after arriving
Keep raw and ready-to-eat foods separate

Taking these precautions helps maintain the cold chain and reduces the risk of food contamination.

How long can food safely stay out?

One of the simplest food safety rules is the "two-hour rule"—but during a heatwave, even that may be too long.

As Katherine Pavling explains:

"Bacteria multiply much faster in warm conditions, so food that might normally be safe for a short time can become unsafe more quickly during heatwaves. Taking basic steps to keep food properly chilled is one of the most effective ways to prevent illness."

As a guide:

Up to 2 hours at normal room temperature
No more than 1 hour during very hot weather

If you're unsure whether food has remained at a safe temperature, it's always safer to throw it away.

Why food safety knowledge matters

Whether you're preparing meals at home or handling food professionally, understanding safe food storage practices is essential.

For businesses in hospitality, catering, retail and food manufacturing, maintaining food safety standards protects customers, supports legal compliance and helps safeguard business reputation.

Regular food hygiene training ensures staff understand best practice for food storage, temperature control, cross-contamination prevention and hygiene procedures throughout the year—including during periods of extreme heat.

Learn more about food safety with Virtual College

At Virtual College, we provide accredited online food hygiene training designed to help individuals and organisations build confidence in safe food handling practices.

From Level 1 awareness through to advanced food safety training, our flexible online courses support businesses in meeting their legal responsibilities while helping to reduce the risk of foodborne illness.

As temperatures continue to rise, taking a few extra precautions—and ensuring everyone understands safe food handling—can make all the difference.