SAN BERNARDINO >> For the second time in less than a week, firefighters battled a vegetation fire on Perris Hill in the heart of San Bernardino.
Shortly before 2 p.m. Monday, a person from the football field at Pacific High School called 911 about a fire below the water tower atop Perris Hill.
San Bernardino County firefighters found the southwest slope of the hill completely charred as flames rushed through the light, flashy fuels, turning the grass from a flowing shade of gold to jet black.
The fire was knocked down in about 30 minutes, officials said. It burned about 5 acres.
Firefighters could be seen lighting backfires to prevent the flames from spreading.
Fire officials said 50 personnel from both the county fire department and San Manuel Fire Department responded.
On Thursday afternoon, a section of Perris Hill burned just west of what was once the Del Rosa Bowling alley, charring 1 acre of grass.
Both fires are under investigation.