Brace for another SoCal heat wave. This one could last awhile

We hope you’ve gotten used to the hot weather, because it’s going to be here for a while.

The National Weather Service has issued yet another heat advisory for much of Southern California, less than a week after other high-temperature warnings were lifted.

This week’s advisory will be in place from 10 a.m. Wednesday through Monday. Forecasters expect temperatures to climb steadily over the course of Wednesday and Thursday.

The San Fernando Valley, San Gabriel Valley and other inland areas in L.A., as well as Riverside and San Bernardino counties, will likely see highs ranging from the mid-90s to about 105 degrees. Areas closer to the coast, including downtown Los Angeles and much of Orange County, will hit the 90s. Beaches will hover mostly in the upper 70s.

Humidity will also add to the discomfort. Even though it’s decreasing slightly, it makes cooling down harder, especially at night.

People who work outdoors or do not have air conditioning are especially at risk from the heat and humidity, along with people over 65, young children and other sensitive populations.

Fire risk

Forecasters are warning that conditions are ripe for fires, driven by a combination of wind and dry vegetation.

Southern California hasn’t seen much rain recently, despite the humidity, leaving plants with little moisture and turning them into the perfect fuel.

“Even though the air feels kind of moist, we're in the time of season where it doesn't matter. The fuels are dry and they're ready to go,” said NWS meteorologist Ryan Kittell.

Kittel said people should take extra care with anything that could create a spark, and residents in fire-prone areas should remain aware of their surroundings in case a fire starts.

The fire risk is likely to be concentrated in a few specific areas that will experience higher winds than others, including parts of the 5 Freeway corridor in northern L.A. County, especially around the Grapevine, and in southern Santa Barbara County.

For most of the region, though, winds should stay fairly mild.

Dangerous beach conditions

Southern Californians also have to contend with some ocean-specific risks this week.

Forecasters expect dangerously large waves and strong rip currents to hit the coastline at a time when the heat may drive more people to the beach. The conditions are expected to persist through the weekend.

If you decide to head to the beach, it’s a good idea to ask a lifeguard for advice on the conditions before entering the water. It’s also recommended to swim only near occupied lifeguard stands, stay off of rock jetties and avoid turning your back to the waves.

South-facing stretches of coastline will bear the brunt of the swell, which is being driven by two tropical storms churning hundreds of miles away in the Pacific Ocean.

“Those two systems generated the winds and the waves locally that are pushing towards us, and so that's creating elevated surf and some stronger currents than normal,” Kittel said.

The swell is not expected to cause significant coastal flooding as high tides remain relatively low.