Don't lock kids in cars, Vic ambos plead

Paramedics in Victoria have been called to rescue children locked inside cars more than 200 times since the start of the year, Ambulance Victoria says.

Victorian paramedics have responded to 204 triple-zero calls to rescue children locked inside cars since 2015 began, including 11 on Thursday alone.

Ambulance Victoria group manager Brett Drummond said Ambulance Victoria tests showed that on a day of 29C, the temperature inside a car could reach 44C in 10 minutes and 60C in 20 minutes.

With a week of heatwave conditions on the way, Mr Drummond said leaving children inside a car is extremely dangerous.

"We have seen children die in hot cars in the last few years. Just don't take the risk," Mr Drummond said.

"It's never OK to leave a child in a car, no exceptions, no excuses."

Melbourne's southern and eastern suburbs accounted for 77 of the triple-0 calls since January 1, with the northern and western suburbs accounting for 73 calls. Another 54 call-outs came from regional areas.