Full Notification

HEAT RELATED ILLNESSES - There will be an extended period of widespread triple digit temperatures affecting valleys, lower mountain elevations as well as the Antelope Valley continuing through at least Tuesday. High temperatures for the areas mentioned will be over 100 degrees. Even inland portions of the coastal plain including downtown Los Angeles will likely climb well into the 90s. The hottest days will be today through Tuesday, but starting Sunday there will be increasing humidity moving into the area from Tropical Storm Odile. This may increase heat index values above critical thresholds, especially for the Los Angeles County valleys. Overnight temperatures will remain quite warm over the weekend in the foothills and lower mountain elevations, with lows generally in the 70s. With high temperatures eclipsing 100 degrees, people will need to take extra precautions if working or spending time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. Never, ever, leave children, the elderly, or pets in enclosed automobiles even for a short period of time. Even if the windows are partially open, temperatures can quickly rise to life-threatening levels

HAZARDOUS SWIMMING AND SURF CONDITIONS AT AREA BEACHES AFTER MONDAY - A storm in the southern hemisphere has generated a long-period swell and this swell is expected to arrive Monday. There is a potential for strong rip currents on Monday and Tuesday as the long-period swell arrives. With the hot weather pattern in place, lifeguard rescues could be elevated due to people traveling to the beaches to cool off. Wave models continue to show the potential for increased surf along southeast to south facing beaches of Southern California from Tropical Storm Odile. The higher surf from Odile would likely begin to arrive by Tuesday evening and persist through Thursday. At this point, it is expected that surf height will be similar to what occurred from Hurricane Norbert: low-end advisory level surf for south facing beaches.

POTENTIAL FOR LARGE AND RAPID FIRE GROWTH THROUGH MONDAY - Near record heat, very dry vegetation and some atmospheric instability will bring the potential for large and rapid fire growth. Any fire starts could become plume-dominated with the potential for collapsing smoke columns and gusty outflow winds. Weak offshore flow with a strong ridge of high pressure aloft will result in humidities lowering significantly to critical levels today over inland areas including the mountains of Ventura, Los Angeles, and Santa Barbara Counties. Mountain and foothill areas will continue to be especially vulnerable to large plume-dominated fires through Monday due to the heat, relatively light winds and increasing instability.

NOTE: Red Flag Warning is for Zone 252 (Santa Ynez Mountains) Only! Any changes to the Red Flag Warning will be posted.