Hundreds Arrested In 4th Of July Melee | Heat Wave Forecast | Police Pileup: SoCal In Brief

SOUTHERN CALIFORNIA — Took a break from the news this weekend? Worry not: we've rounded up all the stories you may have missed since Friday to prepare you for Monday.

But before we jump into Southern California's top stories: The National Weather Service issued a dangerous heat warning in parts of Southern California.

A Heat Advisory will take effect at 10 a.m. Tuesday and remain in effect through 8 p.m. Thursday for much of inland Southern California, where temperatures are expected to range from 90 to around 100 degrees, with highs reaching 103 degrees in the warmest mountains and interior valleys, according to the National Weather Service.

The advisory covers the interior mountains of Los Angeles, Ventura, Santa Barbara, and San Luis Obispo counties, along with the San Fernando, San Gabriel, Santa Clarita, Cuyama, and interior San Luis Obispo valleys.

Forecasters said the hottest conditions are expected Wednesday and Thursday afternoons, and additional areas could be added to the advisory if the heat expands. Although temperatures may ease slightly after Thursday in some locations, they are expected to remain above normal into next week, according to the National Weather Service.

Meteorologists warned that the heat poses a high risk of illness for sensitive groups, including young children, older adults, people without air conditioning, and anyone working or exercising outdoors.

Limited overnight and morning low clouds along the coast are expected to provide little relief inland as weak onshore flow continues, according to the National Weather Service.

The weather pattern is also expected to increase wildfire concerns. Very warm, dry conditions, combined with periods of gusty winds, are forecast to create widespread elevated to briefly critical fire weather conditions across portions of Southern California.

Farther east, the National Weather Service issued an Extreme Heat Warning from Tuesday through Thursday for the lower deserts, including areas around El Centro, where afternoon highs are forecast to reach 111 to 116 degrees.

The National Weather Service advises residents to drink plenty of water, stay in air-conditioned buildings whenever possible, avoid prolonged sun exposure, wear lightweight clothing, limit strenuous outdoor activity to the early morning or evening, and check on neighbors and relatives who may be especially vulnerable to the heat.

Catching up on other headlines from the weekend: Newport Beach police arrested 402 people after thousands of juveniles and young adults flooded the Balboa Peninsula during Fourth of July celebrations, prompting reports of fights, fireworks, and other disturbances. Authorities declared an unlawful assembly, urged residents to shelter in place, and deployed about 350 officers from 18 law enforcement agencies to restore order.

Meanwhile, San Diego’s Humane Society has taken in 85 lost pets since Fourth of July celebrations began. The agency is urging owners to check the Humane Society’s lost-and-found listings as soon as possible. The organization is waiving all pet reclaim fees until July 7 in El Cajon, Escondido, Oceanside, and San Diego to help reunite pets with their families.

Plus, no one has yet matched all six numbers in the California Lotto, sending the estimated grand prize soaring to for Monday's drawing.

Here are some of the stories you may have missed:

Hundreds Arrested, Officers Injured In July 4 Newport Beach Chaos

Police closed beaches and arrested 402 people after massive crowds, fights, fireworks, and looting erupted on July 4 in Newport Beach.

Fireworks Trigger Surge Of Lost Pets In San Diego County

More than 80 lost pets have been taken in by the San Diego Humane Society since Independence Day celebrations began.

RivCo Police Cruiser Slams Into Two Vehicles

Two Menifee police officers and at least two other people were hospitalized after a patrol vehicle collided with two civilian vehicles.

75 Year Old RivCo Woman Struck And Killed

A 75-year-old woman died after an Audi struck her as she stepped from a center median, police said.

Powerball Jackpot Climbs To $416 Million After Another Winnerless Drawing

No one matched all six numbers Saturday night, sending the estimated grand prize soaring to $416 million for Monday's drawing.

LACo Defends Mental Health Clinician's Actions Prior To LAPD Shooting

LA County argues a mental health clinician acted properly before an LAPD officer fatally shot Yong Yang.