* WHAT...Large breaking waves of 3 to 6 feet. Dangerous rip currents.

* WHERE...Ventura County Beaches, Malibu Coast and Los Angeles County Beaches.

* WHEN...Through Sunday evening.

* 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.

* WHAT...For the Heat Advisory, temperatures between 93 to 103 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures between 97 and 107 possible.

* WHERE...A portion of southwest California.

* WHEN...For the Heat Advisory, from 10 AM to 8 PM PDT Wednesday. For the Extreme Heat Watch, from Wednesday evening through Monday evening.

* IMPACTS...There is a high risk for dangerous heat illness for anyone, especially for the very young, the very old, those without air conditioning, and those active outdoors. There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors.

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

* WHERE...in the South Coast Air Basin and Coachella Valley. Levels of ozone pollution can vary by time and location depending on emissions and air pollution transport.

* WHEN...until 8 PM Monday. The highest ozone levels typically occur in the afternoon and early-evening hours.

* IMPACTS... Ozone air pollution can cause serious health problems, including trouble breathing, asthma attacks, and lung damage. Everyone can be affected, but sensitive groups such as people with lung disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk.