UPDATE at 4 p.m. Wednesday: The red flag warning issued for the Santa Monica Mountains National Recreation Area was cancelled just before 4 p.m. Wednesday.
The storm moved inland before reaching the area around Malibu, Agoura Hills and Calabasas.
"Significant or widespread dry lightning is no longer expected," the National Weather Service reported.
Original post: A weak low pressure system could bring dry lightning to the region Wednesday, prompting forecasters to issue a red flag warning for the Santa Monica Mountains National Recreation Area.
"The recent heat wave has primed dry vegetation across the entire region with most areas reporting critical fuel moisture levels," National Weather Service forecasters warned.
The warning is in effect from midnight to 5 p.m. Wednesday.
The low pressure system is expected to move through the region Tuesday night into Wednesday morning, making the atmosphere unstable from the San Luis Obispo County Mountains to Ventura and Los Angeles County, the NWS reported.
Wind gusts up to 40 mph are expected around the thunderstorms, according to the NWS.
Dry lightening can result in fire ignition and help fires spread rapidly, according to Capt. Mike Parker of the Sheriff's Headquarters Bureau.
Pacific Palisades and Brentwood are at the base of the Santa Monica Mountains.