Heat Wave and High Waves Threaten Southern California

Southern California braces for a dual threat this week, with a dangerous heat wave and hazardous high waves along the coast. A high-pressure system moving in from the east, combined with Tropical Storm Elida, is to blame. Elida’s movement northward in the Pacific Ocean will bring hazardous surf and strong rip currents to Southern California beaches.

Heat Wave Impact

The National Weather Service office in Oxnard forecasts high heat starting Tuesday, lasting seven days. A major heat risk is expected by the weekend. Areas like the Inland Empire, inland Orange County, parts of San Diego County, and deserts and mountains will particularly feel the impact. Temperatures may reach:

• 105 degrees in Lancaster
• 103 in Canoga Park
• 98 in Santa Clarita
• 95 in Covina
• 89 in downtown Los Angeles
• 86 in Santa Barbara and Thousand Oaks
• 85 in Long Beach

By the week’s end, temperatures may surpass 100 degrees in parts of the Inland Empire and San Diego County’s interior valleys, and exceed 110 in desert areas.

Risk of Fire

Meteorologists warn of critical fire weather conditions in interior areas from Tuesday through Monday. Weak-to-moderate sundowner winds in southwestern Santa Barbara County could rapidly spread fires. The winds, moving down the southern slopes of the Santa Ynez Mountains, pose a risk during late afternoon and evening.

Coastal Hazards

Beaches aren’t a safe escape from the heat. Tropical Storm Elida’s northerly movement is causing high surf. Orange County already sees waves of 4 to 6 feet high, with some reaching 8 feet. These conditions could persist through Tuesday before potentially escalating again due to Tropical Storm Fausto, which may generate another swell later in the week.

Tropical Storm Manifestations

Elida remains far offshore from California, yet its moisture plume affects areas like the San Francisco Bay Area with chances of light rain and isolated lightning strikes. The phenomenon predicts colorful sunsets, influenced by monsoon moisture and midlevel clouds.

Elida also increases humidity in Los Angeles and San Francisco Bay Areas. Unusually warm sea surface temperatures contribute to muggy coastal air.

Current Climate Trends

Southern California’s marine heat wave contributes to warm air and humidity. According to the National Oceanic and Atmospheric Administration, these sea surface temperatures are historically high for this time of year.

Advice for Residents

Residents are advised to avoid outdoor work in extreme heat. Frequent breaks in the shade and staying in air-conditioned areas are recommended. Walking dogs during peak heat and leaving children or pets in parked cars is strongly discouraged.

Climate trends indicate a historically warm period with human-caused climate change driving record temperatures, according to climate scientist Zachary Labe. The last 12 months are the warmest on record for the lower 48 states.