Police have charged a 32-year-old woman after a toddler was found alone in a car in hot conditions in Melbourne's west and taken to hospital in a critical condition.

Key points: Emergency services were called to the car outside The Brook Point Cook hotel

Emergency services were called to the car outside The Brook Point Cook hotel Temperatures rose to nearly 38 degrees Celsius in the area yesterday afternoon

Temperatures rose to nearly 38 degrees Celsius in the area yesterday afternoon The woman from Gladstone Park is facing charges of negligently causing serious injury and reckless conduct endangering life

A spokesperson for Melbourne's Royal Children's Hospital said the 14-month-old boy remained in a "critical but stable condition" this afternoon.

Emergency services were called to the car park of The Brook Point Cook hotel at Sneydes Road, Point Cook about 3:15pm yesterday.

The Brook Point Cook hotel is marketed as a family-friendly venue with a restaurant, a function room, a cafe and live entertainment as well as gaming rooms.

The Geelong Football Club has licences for 80 poker machines at the site.

Melbourne's top temperature yesterday was 36.5 degrees Celsius with poor air quality before storms swept across the state about 4:00pm.

Laverton, near Point Cook, recorded temperatures as high as 37.5C at 1:28pm yesterday.

A Victoria Police spokeswoman said the Westgate Sexual Offences and Child Abuse Investigation Team charged the Gladstone Park woman with negligently causing serious injury and reckless conduct endangering life.

She was bailed to appear at Melbourne Magistrates' Court on January 23.

Emergency services were called to the car park of the hotel yesterday afternoon. ( ABC News )

The Victorian Government last year launched its "Never Leave Kids in Cars" campaign.

According to the campaign website, a child's body temperature rises three to five times faster than an adult's and when it is 30C outside, a child could be suffering in heat of up to 60C.

At the launch of a new "Safe Seats, Safe Kids" campaign this morning, Victorian Health Minister Jenny Mikakos said almost 1,500 children — typically babies and toddlers — were left in vehicles in Victoria in the first 11 months of last year.

Ms Mikakos said she felt "absolutely gutted" after hearing about yesterday's incident at Point Cook.

"It's a tragic set of circumstances and it is a very clear reminder to parents about the risks of leaving a child unattended in a vehicle, particularly on a hot day," she said.

Kidsafe Victoria chief executive Melanie Courtney said the fact that people were calling triple zero to report children locked in cars meant that education campaigns were working.

"We do know that [as part of] the State Government campaign [and] campaign from Kidsafe we do have signs that go up in pubs, hotels, shopping centres," she said.

"So all of those educational messages are really critical in making sure that communities are aware."