EGLIN AFB — Significant progress was made on three wildfires on the Eglin Air Force Base reservation Saturday, according to a spokesman for one of the groups fighting the blazes.

Brett Williams, spokesman for Eglin's Wildland Support Branch, credited "improved weather conditions" for assisting with controlling the fires, and said Saturday evening that as of that time, "none of the wildfires are a direct threat to any structures or the public."

In an email update on the fires issued at 7 p.m. Saturday, Williams said the fire that started Thursday on Test Area A-78 north of Florosa was still estimated at 1,000 acres, and was "approximately 50 percent contained."

Information from Friday had placed the size of the Test Area A-78 blaze at 500 acres.

According to Williams, the fire "is still in an inaccessible portion of a large, wet swamp that is preventing full containment by crews." But, Williams  added, "there was very little fire activity throughout the day aside from a few areas smoking interior of the fire perimeter."

Sunday plans for fighting the Test Area A-78 fire include using crews "to monitor, map (the) fire perimeter, and take action as needed," Williams noted.

Elsewhere on the Eglin reservation, the fire ignited Thursday on Test Area A-77, located west of State Road 87 and north of Holley, "is currently at 4,100 acres and is approximately 90 percent contained at this time," according to the 7 p.m. Saturday update.

Part of the reason for the large size of the blaze was a "strategic burnout" conducted Saturday, burning areas around the fire to halt its advance. According to Williams, the "burnout operation was successful in securing the majority of the remaining fire perimeter."

The burnout was easier than it might otherwise have been, Williams explained, because the area had "received frequent prescribed fire treatments over the past 20 years that reduced hazardous fuels in the area."

Sunday's plan for addressing the Test Area A-77 fire, Williams said Saturday evening, "is to conduct a smaller 830-acre strategic burnout operation to bring the fire to 100 percent containment."

It's not clear exactly how the Test Area A-77 fire began, but a likely explanation would be training activities by Air Force Special Operations Command, Eglin AFB spokesman Mike Spaits speculated Friday.

A third Eglin reservation wildfire, which started Friday evening in Tactical Training Area F-17 near the Camp Rudder 6th Ranger Training Battalion, a short distance south of Interstate 10 and the city of Holt, was contained Saturday after burning approximately 80 acres, according to Williams.

On Sunday, Williams said in the email, Eglin crews "will check the fire ... to ensure it is still contained with no issues."

As with the Test Area A-77 fire, Williams said, containing the Tactical Training Area F-17 blaze was "made easier by prescribed burns in this area within the past two years."

The Eglin wildfires are being controlled by the Eglin Wildland Support personnel with assistance from the Avon Park Wildland Support Module, the U.S. Fish and Wildlife Service, the Bureau of Land Management and the Longleaf Alliance.

Williams has been providing updates on the wildfires at least once daily. The Northwest Florida Daily News will continue to report on those updates as they become available.