Warm weather and a public holiday long weekend have led to an influx of patients seeking emergency help, resulting in an alert being activated for a state's ambulance service.

Ambulance Victoria activated a code orange alert on Saturday night for the Melbourne and Geelong areas following a significant increase in demand for services, about five to 10 per cent higher than expected.

There were more than 100 emergency cases that the service had expected to receive, chief executive Jordan Emery said.

"In part, that's been driven by the spring carnival festivities and the warmer weather, with more Victorians out and about enjoying the warm weather," he said.

Alcohol consumption and related harms increased due to the spring carnival festivities, while elderly people and those with pre-exis

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