A long-lasting October heat wave will continue to bring dangerous temperatures to Southern California through at least Thursday.
Highs Monday are expected to remain widespread in the 90s to around 105 degrees in Los Angeles County valleys and coastal areas, or about 15 to 27 degrees above normal for this time of year, according to the National Weather Service.
A record high of 101 degrees was set Sunday at Hollywood Burbank Airport, breaking the previous record of 100 degrees set in 1964, the NWS said.
Some locations will be within a few degrees of daily records Monday, according to the weather service.
“A few calendar day temperature records may be broken each day through Thursday,” forecasters said.
Extreme heat warnings remain in effect through 8 p.m. Thursday for coastal and valley areas of Los Angeles County and coastal and inland Orange County.
Overnight temperatures are not expected to provide much relief, with lows generally in the upper 60s and 70s through Tuesday night and locally in the 80s in some mountains and foothills, the NWS said.
The immediate Los Angeles County coast is expected to gradually cool as offshore flow weakens and sea breezes strengthen. Highs along the coast could fall to between 82 and 90 degrees by Thursday, according to the NWS.
Temperatures are expected to begin trending lower Friday, with more significant and widespread cooling forecast for Saturday and into next week.
Forecasters said there is a 20% to 30% chance of showers next weekend as moisture from distant Hurricane Rachel moves into the region.
Rachel also is expected to generate increased surf along the Los Angeles County coast, including Catalina Island. A beach hazards statement will take effect at 4 p.m. Tuesday and remain in effect through 11 p.m. Friday.
The initial southeast swell is expected to affect Long Beach and Catalina Island Tuesday and Wednesday, before shifting to a more southerly direction that could affect beaches including Zuma later Wednesday through Friday.
The weather service said coastal flooding or high-surf advisories may be issued as the forecast is refined.
A separate long-period west swell from Super Typhoon Choi-Wan is expected to arrive Saturday night and build Sunday, potentially producing high surf and coastal flooding, including along the Palos Verdes Peninsula, especially during morning high tides.