KAYSVILLE -- Large plumes of smoke brought numerous onlookers to the west side of Kaysville.
Lightning struck around 2 p.m. Tuesday in the middle of the Great Salt Lake Shorelands Preserve, igniting a fire that was burning about 10 acres of phragmites.
Kaysville fire crews were unable to get to the area because of the marsh, so they were letting the fire burn itself out, said Jason Curry, with the Utah Division of Forestry, Fire and State Lands.
"Winds were a concern," Curry said. "It could change the direction of the fire."
The winds were changing direction every few minutes throughout the afternoon and evening, keeping fire crews guessing on what would happen.
Curry said fire crews at one time believed the fire may have been burning itself out, but the winds shifted, pushing the fire to the east. The nearest homes are at least a mile away from the fire.
Crews spent time watching the blaze while a helicopter from the Bureau of Land Management was on the scene, dropping buckets of water when needed.
Curry said crews would monitor the fire overnight and into today, and as the day goes on they will assess things and see what they need to do.
"The biggest concern is to make sure it doesn't get into a situation where it's threatening homes," Curry said.
Another thunderstorm in the area could cause more problems, Curry said.
Fire crews from surrounding areas were called to the scene on standby.
Layton Fire Chief Kevin Ward saw the fire and drove to the area because it seemed close to the Layton/Kaysville border.
Ward said it was a "red flag" day Tuesday, which means no fires were allowed because of high temperatures, low humidity and erratic winds.
Reporter Jasen Asay contributed to this story.