The SDA Union, which represents retail, fast-food, and warehouse workers, has taken action against several businesses in South Australia following the January heatwave.

SDA said it had more than 80 workers report concerns around the impact of extreme heat at work, which the union said “can have a severe impact” on an individual’s health.

The SA heatwave saw temperatures reach 44 degrees Celsius in northern Adelaide, with the peak occurring on January 6.

“Thanks to SDA members reporting issues, we have raised issues with employers and addressed safety concerns, leading to air conditioner upgrades and more flexibility for workers,” a union spokesperson said.

The changes include ceiling repairs, new air conditioning units and additional breaks for staff. The companies include Myer, Coles, Chemist Warehouse, Big W, Woolworths, McDonald’s, and Hungry Jack’s.

“When it comes to extreme heat and heatwaves, remember: Your employer is required by law to maintain a safe workplace,” the spokesperson added.