It's been a foggy start to the day for Adelaide.
A road safety warning was issued before most of us got up with reduced visibility making conditions on the road very dangerous.
Advice for drivers includes switching headlights on, leaving a safe distance from the car in front and slowing down.
A number of flights have been diverted with others directed into a holding pattern until the fog lifts.
The advice is to check with your airline if you're catching a plane today.
The fog blanketing the City to the Hills is expected to hang around until late morning.