{"id":2657,"date":"2025-05-21T04:49:30","date_gmt":"2025-05-21T08:49:30","guid":{"rendered":"https:\/\/us.weatheramerica.com\/?p=2657"},"modified":"2025-06-27T04:15:43","modified_gmt":"2025-06-27T08:15:43","slug":"weather-warning-heat-wave-in-southern-california","status":"publish","type":"post","link":"https:\/\/weatheramerica.com\/us\/2025\/05\/21\/weather-warning-heat-wave-in-southern-california\/","title":{"rendered":"Weather warning: heat wave in Southern California"},"content":{"rendered":"<p><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2658\" src=\"http:\/\/us.weatheramerica.com\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-southern-california_2105.jpg\" alt=\"\" width=\"2000\" height=\"1500\" srcset=\"https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-southern-california_2105.jpg 2000w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-southern-california_2105-768x576.jpg 768w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-southern-california_2105-1536x1152.jpg 1536w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-southern-california_2105-860x645.jpg 860w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-southern-california_2105-195x146.jpg 195w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/><\/p>\n<h3><strong>Blazing temperatures ahead for Los Angeles and inland valleys<\/strong><\/h3>\n<p><strong>Southern California<\/strong> is about to be scorched by an intense <strong>heat wave<\/strong> this week, with the most extreme temperatures forecast for <strong>Wednesday<\/strong> and <strong>Thursday<\/strong>. <strong>Inland areas<\/strong>, especially in <strong>Los Angeles County<\/strong>, will face the brunt of this <strong>early summer heat surge<\/strong>, while <strong>coastal cities<\/strong> will also experience unusually high readings.<\/p>\n<p>According to <strong>Ryan Kittell<\/strong>, a <strong>National Weather Service meteorologist<\/strong> in <strong>Oxnard<\/strong>, this week&#8217;s pattern marks a <strong>\u201cnoticeable warm-up\u201d<\/strong> with temperatures <strong>ranging from 90\u00b0F to 100\u00b0F<\/strong> (32\u00b0C to 38\u00b0C) away from the coast. Some <strong>valleys<\/strong> might even approach <strong>record-breaking highs<\/strong>.<\/p>\n<h3><\/h3>\n<h3><strong>Where the heat will hit hardest<\/strong><\/h3>\n<p>The <strong>San Fernando<\/strong>, <strong>San Gabriel<\/strong>, and <strong>Santa Clarita valleys<\/strong> are set to sizzle. Forecasts show that <strong>Woodland Hills<\/strong> and <strong>Canoga Park<\/strong> could top <strong>100\u00b0F<\/strong> (38\u00b0C), traditionally the <strong>hottest locations in Los Angeles County<\/strong>.<\/p>\n<p>Moving farther inland, <strong>Palm Springs<\/strong> is expected to peak at a scorching <strong>105\u00b0F<\/strong> (41\u00b0C) by <strong>Thursday<\/strong>, underlining the <strong>extreme heat risk<\/strong> for the <strong>desert regions<\/strong>.<\/p>\n<p>Even areas that usually benefit from the <strong>Pacific Ocean\u2019s moderating breeze<\/strong> will warm up significantly. <strong>Los Angeles International Airport<\/strong> may tie its May 21 record at <strong>78\u00b0F<\/strong> (26\u00b0C), while <strong>Long Beach Airport<\/strong> could hit <strong>87\u00b0F<\/strong> (31\u00b0C). <strong>Santa Barbara<\/strong> might reach its previous record of <strong>79\u00b0F<\/strong> (26\u00b0C).<\/p>\n<h3><\/h3>\n<h3><strong>Serious inland risks and past rescues<\/strong><\/h3>\n<p>The most <strong>dangerous conditions<\/strong> will be inland, where temperatures and <strong>dry air<\/strong> combine to increase the risk of <strong>heat-related illnesses<\/strong>. The <strong>weather service<\/strong> is urging residents to avoid <strong>strenuous outdoor activity<\/strong> between <strong>10 a.m. and 6 p.m.<\/strong>, especially in <strong>valley and desert zones<\/strong>.<\/p>\n<p>Earlier this month, <strong>emergency crews<\/strong> had to respond to several <strong>heat-related incidents<\/strong>, including:<\/p>\n<ul>\n<li><strong>15 people rescued in Orange County<\/strong> and <strong>9 in Riverside County<\/strong> on <strong>May 10<\/strong>, when temperatures soared into the <strong>high 90s<\/strong> (mid-30s\u00b0C).<\/li>\n<li>A <strong>hiker in the Hollywood Hills<\/strong> was <strong>airlifted<\/strong> due to <strong>heat exhaustion<\/strong>.<\/li>\n<\/ul>\n<h3><\/h3>\n<h3><strong>Fire weather outlook and air quality<\/strong><\/h3>\n<p>While the heat and <strong>localized gusty winds<\/strong> raise concerns, no <strong>red flag warnings<\/strong> have been issued yet. <strong>Vegetation remains relatively green<\/strong> following the <strong>recent rainy season<\/strong>, which helps curb <strong>fire danger<\/strong>. However, <strong>dry grass patches<\/strong> still pose a <strong>wildfire risk<\/strong>, especially during peak heat.<\/p>\n<h3><\/h3>\n<h3><strong>When relief is expected<\/strong><\/h3>\n<p>This intense <strong>high-pressure system<\/strong> is projected to <strong>weaken by Friday<\/strong>, ushering in <strong>cooler ocean air<\/strong>. By <strong>the weekend<\/strong>, much of <strong>Los Angeles County<\/strong> should enjoy more <strong>moderate temperatures<\/strong>, in the <strong>70s to low 80s<\/strong> (21\u00b0C to 28\u00b0C), just in time for <strong>Memorial Day<\/strong>.<\/p>\n<p>While the <strong>deserts<\/strong> will <strong>remain hot<\/strong> through <strong>Saturday<\/strong> and <strong>Sunday<\/strong>, most of <strong>Southern California<\/strong> can look forward to <strong>milder weather<\/strong> ahead.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Blazing temperatures ahead for Los Angeles and inland valleys Southern California is about to be scorched by an intense heat wave this week, with the most extreme temperatures forecast for Wednesday and Thursday. Inland areas, especially in Los Angeles County, will face the brunt of this early summer heat surge, while coastal cities will also [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":2658,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2657","post","type-post","status-publish","format-standard","has-post-thumbnail","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Weather warning: heat wave in Southern California - United States - Weather America<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/weatheramerica.com\/us\/2025\/05\/21\/weather-warning-heat-wave-in-southern-california\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Weather warning: heat wave in Southern California - United States - Weather America\" \/>\n<meta property=\"og:description\" content=\"Blazing temperatures ahead for Los Angeles and inland valleys Southern California is about to be scorched by an intense heat wave this week, with the most extreme temperatures forecast for Wednesday and Thursday. 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