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This week's extreme heat reaches its peak. See the hot weather timeline
Summary by The Los Angeles Editorial Desk Jonathan Lloyd , NBC Los Angeles (KNBC)
· July 23, 2026
· 1 min read
The warmest day in an extended stretch of extreme heat arrives Thursday when widespread triple-digit temperatures are in the forecast for Southern California. Triple-digit highs are expected in the high desert and parts of the San Fernando Valley with low 90s in the downtown LA forecast. “Today i...
Story provenance No corrections
Summary created by The Los Angeles Editorial Desk — automated, rule-governed Original reporting Jonathan Lloyd, NBC Los Angeles (KNBC) Original story Read at the source Source published Jul 23, 2026 AI assistance Automated summary drawn from the source’s own published text Prepublication human review No — editorial rules, flagged-item review, and published samples
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Key takeaway Triple-digit highs are expected in the high desert and parts of the San Fernando Valley with low 90s in the downtown LA forecast.
Why this matters in The Los Angeles
As the heat wave reaches its peak, Los Angeles residents can expect increased strain on the city's power grid and water supply. The high temperatures will also exacerbate air quality issues, particularly in the San Fernando Valley where triple-digit highs are forecasted. This could lead to increased health risks for vulnerable populations, such as the elderly and young children. The city's emergency services may also see an uptick in heat-related calls, putting a strain on local resources. Residents are advised to take precautions to stay cool and hydrated, and to check in on neighbors who may be susceptible to heat-related illnesses. The heat wave's impact on local transportation and outdoor events should also be closely monitored, as extreme heat can lead to disruptions and cancellations. As the city navigates this extreme weather event, it will be crucial to prioritize public health and safety.
About this story
Original reporting by NBC Los Angeles (KNBC) . The Los Angeles surfaces reporting from trusted publishers and adds local editorial context so readers can quickly understand what a story means for their community. We attribute every source, link to the original report, and follow a documented editorial standards policy. To understand how stories are selected and reviewed, read our about page .
For the complete original report, visit NBC Los Angeles (KNBC) . Have a tip or correction? Contact our newsroom .
Category: local Published: July 23, 2026 Source: NBC Los Angeles (KNBC) Reading time: 1 min
Frequently asked about this story
What is this story about? The warmest day in an extended stretch of extreme heat arrives Thursday when widespread triple-digit temperatures are in the forecast for Southern California. Triple-digit highs are expected in the high desert and parts of the San Fernando Valley with low 90s in the downtown LA forecast. “Today i...
When was this published? This article was first published on July 23, 2026 by NBC Los Angeles (KNBC) and curated for The Los Angeles readers.
Who reported this story? This story was reported by Jonathan Lloyd at NBC Los Angeles (KNBC). To learn more about how The Los Angeles selects and reviews stories, see our editorial standards .
Where can I find related coverage? See more local coverage from The Los Angeles, or browse our daily briefing and topic hubs .
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