At least three fires were reported Saturday in Hyde Park, Mendon and Nibley. Cache County Fire District Chief Gary Roberts and Smithfield Fire Chief Jay Downs said residents who had burn permits were legally burning their green waste when the wind started to pick up and spread the fires out of control.

Calls about the fires were made between 1:45 p.m. and about 3:30 p.m., and all three of the blazes were contained and brought under control within about an hour after crews arrived.

The three incidents prompted the fire chiefs to issue a reminder of safety to people who plan to burn their green waste in the coming weeks.

“They need to monitor the wind,” Roberts said, noting that his office has tried to remind people when they pick up their burn permits that they shouldn’t burn if the wind exceeds about 5 mph.

“Keep your fires small and keep your water source handy like you’re supposed to,” Downs added.

Part of the problem behind Saturday’s fires and other incidents earlier in the week, Roberts said, is the low relative humidity, which is unusual for this time of year.

“Our relative humidity has dropped into the teens and we usually don’t see that until the end of June or July,” Roberts said. “It makes that old dead fuel just really tinder dry. If you get this south wind behind it, there she goes.”

No structures were damaged by Saturday’s fires and no one was injured. The Hyde Park fire was located at about 400 West and 3600 North, the Mendon fire as at 83 S. 200 West and the Nibley incident was near 5454 Sleepy Hollow Lane.