Tests by child first-aid trainers CPR Kids showed that even on a mild and breezy day a covered pram was at least four degrees warmer than outside. On hotter days the difference can be even more alarming.
"The temperatures can be 15C above what is the outside ambient temperature," paediatrician Dr Katie Reeves told Seven News.
Secured coverings restrict air circulation, quickly heating the inside of the pram. NSW Health guidelines suggest only covering your baby’s pram or stroller with a light cloth that still allows the air to circulate. They also suggest removable panelling or placing them in more open strollers.
Your best best is to avoid the outdoors during the hottest part of the day (between 10am and 3pm). Also, regularly check your baby's temperature.