* WHAT...Dangerously hot conditions with temperatures up to 90 at the coast and 105 in the valleys.

* WHERE...Coast and valleys of Los Angeles and Ventura Counties.

* WHEN...From Friday morning through Thursday, October 08.

* IMPACTS...Heat related illnesses increase significantly during extreme heat events.

* ADDITIONAL DETAILS...Very hot temperatures are likely to continue into the second week of October, possibly requiring an extension of this product.

* WHAT...The South Coast AQMD has issued an air quality alert due to increased fine particle pollution from wildfire smoke. Visit https://www.aqmd.gov/alertinfo to check current and forecasted air quality levels.

* WHERE...in the Santa Clarita Valley, the I-5 corridor, and the Angeles National Forest. Levels of particle pollution can vary by time and location depending on fire activity and local weather conditions.

* WHEN...8 PM Saturday until 8 PM Sunday.

* IMPACTS...Particles in wildfire smoke can get deep into the lungs and cause serious health problems such as heart attacks, strokes, asthma attacks, and difficulty breathing. Everyone can be affected, but 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.