Hampshire Fire and Rescue Service was called to Salisbury Road in Totton at around 4pm today after a fire started in a camper van.
The blaze then spread to a nearby barn Which contains approximately 500 bales of hay and eight crews have spent the afternoon tackling the fire.
A spokesperson for Hampshire Fire and rescue said: “Crews are currently in attendance at a barn fire in Ower.
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“Residents in the surrounding area are asked to close their doors and windows due to smoke and drivers are asked to take care in the area around junction 2 on the M27.
“The initial call came in at around 4pm this afternoon and related to a fire in a camper van.
“The fire then spread to the adjacent barn which contains approximately 500 bales of hay.
“There are eight fire engines, plus water carriers and other specialist vehicles on the scene. Firefighters wearing breathing apparatus are using four jets to tackle the blaze.”