The threat of fire danger in the Cleveland National Forest is listed as very high, meaning fires can start very easily and spread at a very fast rate.
So, officials will initiate elevated fire restrictions Monday.
The Forest Service said the high temperatures and thick brush have increased the risk of fire in the 460,000-acre area.
Under a very high fire danger, fires start easily from all causes, spread rapidly and intensify quickly.
Among the restrictions are that wood or charcoal fires will be allowed only in designated fire rings located in identified developed campgrounds and in identified developed picnic areas.
Also, spark arrestors are required for all off-highway vehicles, chainsaws, and other internal combustion equipment.
Get more information on the USDA website.
The Cleveland National Forest is divided into the Descanso, Palomar and Trabuco Ranger Districts which are located in the counties of San Diego, Riverside, and Orange.
Residents use the area and trails to hike, bike, camp, climb, fish or have a picnic.