Separate lightning strikes on Friday sparked two nearby fires. Now known as the Square Complex fire, about 16,000 acres 14 miles north of St. George have been burned.
Overcast skies and high humidity kept the fire from significantly advancing Monday, but winds with gusts of up to 20 mph were forecast Tuesday.
About 300 firefighters, 17 engines and three helicopters were working the fire Tuesday, said Bureau of Land Management spokesman David Boyd.
The weather could ``bring the fire back to life,'' said another fire spokesman, Jeff Gildehaus. ``We're hoping for the best and working like crazy.''
The fire was 20 percent contained, and officials say they still expect it to be fully contained by Sunday.
No structures are being threatened. Except for several firefighters with minor heat exhaustion, no injuries have been reported.
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