A downpour rushed over a bridge in Arrowbear Lake, shutting down one of two roads into the lakeside community when the heaviest rainfall moved in and the water level started to rise.
San Bernardino County Public Works crews closed the road Sunday afternoon just to be safe.
"If anyone were to walk across this, they would lose their footing and go right over the edge, so it's definitely safer to barricade it," said Mike Scullin of the Arrowbear Water District.
The heavy rain caused road closures across the Inland Empire.
Lytle Creek Road was closed and state highway 18 was closed between the Big Bear Lake Dam and the Green Valley turnoff.
A flash flood warning was issued about 3:30 p.m. and was to remain in effect until 8 p.m. for northwestern San Bernardino County.
Northbound traffic on the 215 freeway was reduced to one lane due to a mudslide. Crews rushed to clean up the mess.
Other areas of San Bernardino were also plagued by the bad weather.
Snow Valley Mountain Resort was closed for three days in a row due to snow levels that are too high.
"I work at Snow Valley, so as a ski resort we need snow," said Kalah Savage of Arrowbear. "We're hoping maybe this week."
However, there's still hope for a white Christmas, not a wet one.
"The snow level is supposed to drop," said Kevin Somes, also a Snow Valley Ski Resort employee. "Two to three feet is what we're hearing. We'll resume snowmaking as soon as we can and hopefully have a white Christmas."