About midday on Saturday, a 49-hectare grass fire broke out at Gormans Road, Yarragundry.

The fire forced the closure of the Sturt Highway in both directions as firefighters took about six hours to contain it.

At its peak, there were 17 fire trucks and 45 firefighters from across Wagga. Two fixed-wing planes also provided water bombing support.

Bradley Stewart, Riverina zone's operational officer at the NSW Rural Fire Service, said the fire had "very real potential to cause some significant damage to local residents in that area".

"It was a very close call, but the good work of our firefighters from the RFS and Turvey Park Fire and Rescue meant we're able to get on that fire quickly," Mr Stewart said.

"We also had good support from a couple of landowners who had their own private fire trucks in attendance."

With Saturday's fire danger at very high, Mr Stewart said the grass fire was difficult to control.

"In those conditions, embers could be developed to create spot fires, which have the potential to threaten homes earlier than predicted," he said.

"The fire started well before the weather front came through and there was no lightning in the area.

"Had it been more windy, it would've precluded the use of the aircraft."

Mr Stewart said the rain about 5pm Saturday helped with the containment and that one firefighter was treated for smoke inhalation.

"Considering we've had an absolute bucket load of lightning, more fires could have been started without that moisture [from rain]," he said.

The fire also impacted the Yarragundry Park Speedway. In a statement, the Wagga Motorcycle Sports Club said: "No buildings were lost and our sprinkler system and bore pump are still operational".

Firefighters will continue to monitor the area for the next few days after they received triple zero calls about 9pm on Saturday because several trees fell and caught fire.

The fire is now under investigation by the NSW RFS and police.

As of Sunday afternoon, the RFS listed site as being under control with the alert level being at advice.

Mr Stewart said the incident was a reminder for residents to prepare their bushfire survival plans.

"It's a timely reminder that residents need to prepare their homes and have a discussion with family as to what they should do if threatened by fire," he said.

"The fire season's well and truly here. Yesterday showed that a wind-driven fire can present a very real and significant risk. It can destroy a person's livelihood."

Brigades included those from Turvey Park, The Rock, Uranquinty, Collingullie, Yarragundry, Glenfield Park, Eunony, Forest Hill, Lake Albert, and Riverina Aviation.