Police are investigating three suspicious grass fires that came perilously close to homes in Melbourne's west.
The first blaze broke out at about 8:00pm (AEDT) at Brimbank Park and burned 10 hectares.
Firefighters managed to stop it spreading to a power station.
Metropolitan Fire Brigade (MFB) Commander Darren Conlin says crews had to deal with another fire on the other side of the Maribyrnong River at the same time.
"It is a bit uneasy when you're on the other side of the creek, you've just extinguished one fire and you're watching another fire take off," he said.
No homes were evacuated, but resident Noelene Watty says the second fire was moving fast.
"I looked to my right and it had just started and it started to get away fairly quick, so I rang the fire brigade and they got here pretty quick," she said.
Ms Watty says some neighbours used garden hoses to water grass across the road.
"Maybe it may have helped slow it down a bit... the wind just had it and took it off."
The fire burned one hectare and was quickly brought under control.
But crews were back hours later when a third fire broke out at the nearby Maribyrnong Parklands.
The fire front was more than one kilometre long and burned more than 10 hectares.
Mr Conlin says it came close to an aged care centre.
"We had a nursing home just off Sterling Road. We planted a truck there to protect the residents that were there," he said.
"Our concerns were that the fire was going to jump over a containment line that we were using which was the railway line."
Mr Conlin says the Brimbank Park area is a known as a fire risk.
"The grass is long and dry and you can see now we're only metres away from the grassland and it's right next to houses," he said.
"For people to think it's okay to light fires in these areas is bordering on insane, because it puts people's property and lives at risk."
The MFB says police are checking reports that youths were in the area at the time the fires broke out.