Get ready, Southern Californians. There’s a break from the heat coming.

According to the National Weather Service, you may have to wait another day.

In its Tuesday morning forecast, the weather service said that “significant cooling will begin today as inland flow returns,” but warned that “temperatures will still be in the 90-120 degree range in the mountains and warmer valleys.” Extreme heat warnings remain in effect for Los Angeles and Ventura counties.

In the LA Basin, most places are expected to cool by as much as 10 degrees on Tuesday. Inland temperatures will remain in the 80s and 90s, while temperatures along the coast could drop into the 70s.

National Weather Service meteorologist Robbie Munroe said temperatures are expected to drop another 10 degrees on Wednesday, with temperatures expected to be slightly below average on Thursday, ranging from 70 to 80 degrees Fahrenheit.

Humidity is expected to be in the 10% to 20% range all week, but Thursday will likely be less dry as the marine layer deepens and brings moisture to the area.

Conditions are expected to be similar in Orange and San Bernardino counties, with the Inland Empire being the warmest and driest area in the region.

The weather service has issued a warning that dangerous conditions exist as the fire continues to spread through the mountains surrounding the Angeles National Forest, including the area where the bridge fire occurred, through Wednesday afternoon.

The emergency is expected to continue in the San Gabriel Mountains and extend to the Interstate 5 corridor and Antelope Valley through Wednesday morning.

In recent days, heat has combined with gusty winds to create conditions ripe for extreme fire growth. Fires have broken out in Los Angeles, San Bernardino and Orange Counties, filling the air with smoke and ash, posing a danger to residents.

On Tuesday, the South Coast Air Quality Management District issued an air quality advisory that will remain in effect through the night due to increased fine particulate matter pollution from wildfire smoke in Orange County and the Inland Empire.

On Tuesday, winds of 20 mph (32 km/h) or more are estimated to be blowing across the region’s hills, sending flames and smoke into surrounding villages.

“It’s literally going to fan the flames,” said Philip Gonsalves, a meteorologist with the National Weather Service in San Diego. “It’s going to increase the speed at which the fire spreads. That’s the bad news. The good news is that the direction of the spread becomes a little more predictable.”

An air quality advisory is in effect until 11 p.m. Tuesday due to increased particulate matter pollution from smoke from wildfires in inland Orange County and the Inland Empire.

Corona-Norco Unified School District announced that Wilson Elementary, Temescal Valley Elementary and Todd Elementary will be closed Tuesday, along with their after-school programs due to poor air quality. The district, which consists of about 50 schools, has also canceled outdoor activities and athletics at all schools until further notice.