* WHAT...For the Beach Hazards Statement, dangerous rip currents and breaking waves due to elevated surf. For the High Surf Advisory, large breaking waves of 4 to 7 feet Friday, increasing to 7 to 12 feet Saturday. Surf heights are expected to decrease to 6 to 9 feet Sunday through Tuesday.

* WHERE...Malibu Coast and Los Angeles County Beaches. Surf will we highest for west-northwest facing beaches.

* WHEN...For the Beach Hazards Statement, through Friday afternoon. For the High Surf Advisory, from 2 PM Friday to 3 PM PST Tuesday.

* IMPACTS...There is an increased risk of ocean drowning. Rip currents can pull swimmers and surfers out to sea. Waves can wash people off beaches and rocks, and capsize small boats nearshore.

* ADDITIONAL DETAILS...A series of significant west-northwesterly swells are expected to produce large surf into next week with highest surf and greatest impacts likely peaking Saturday and potentially again Monday. There is potential for moderate coastal flooding impacts at times, especially Saturday. Some of these impacts may be moderate to significant beach erosion and shallow flooding of normal dry beaches and walkways.

* WHAT...The South Coast AQMD has extended an air quality alert due to harmful levels of fine particle pollution. Visit https://www.aqmd.gov/alertinfo to check current and forecasted air quality levels.

* WHERE...in Vernon, Maywood, Bell Gardens, Westmont, Hawthorne, Inglewood, Downtown LA, East LA and Huntington Park. Levels of particle pollution can vary by time and location depending on emissions and local weather conditions.

* WHEN...until 11:59 PM Thursday.

* IMPACTS...Particle pollution can get deep into the lungs and cause serious health problems such as heart attacks, bronchitis, asthma attacks, and difficulty breathing. Everyone can be affected, but sensitive groups such as people with lung or heart disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk.