Fire crews from Dewsbury rushed to a fire close to a Batley nursery school this afternoon.
The blaze, which covered an area as big as half a tennis court, gained hold close to Foundations Nursery.
A Fire Service spokesperson said: "Crews from Dewsbury responded to a fire in the open just off Cambridge Street in Batley at 2.36 this afternoon.
"The fire took place in a area 10 by 15 metres wide."
Firefighters have got the blaze under control. Traffic is understood to be moving slowly in the area.