local
Heat wave and high humidity will blast much of the eastern US this week, meteorologists say
By Marc Levy, Associated Press at KSAT 12 (ABC affiliate)
· June 28, 2026
· 4 min read
A long and dangerous heat wave will blast a large swath of the central and eastern United States this week, the National Weather Service said, with temperatures rising ahead of the July Fourth holiday and feeling even hotter because of the high humidity that's arriving with it.Already, parts of t...
Key takeaway Forecasters say several days of high temperatures — some above 100 degrees F — will settle in across the lower Great Lakes, the mid-Atlantic and the Mississippi and Ohio River valleys.
Why this matters in The San Antonio
San Antonio residents can expect to feel the effects of this heat wave, particularly with the added humidity. As central Texas is already experiencing temperatures around 100 F, the city's residents should be prepared for an extended period of high heat. The National Weather Service's warning of severe wildfire conditions developing across much of the West is also relevant to San Antonio, given the region's history of wildfires. With the heat index potentially reaching 115 F, outdoor activities, especially during the upcoming July Fourth holiday, will need to be carefully planned to avoid heat-related illnesses. The city's vulnerable populations, such as the elderly and young children, will be particularly at risk. Residents should take necessary precautions, including staying hydrated and seeking shade when outdoors, to mitigate the impact of this heat wave.
About this story
Original reporting by KSAT 12 (ABC affiliate) . The San Antonio 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 KSAT 12 (ABC affiliate) . Have a tip or correction? Contact our newsroom .
Category: local ·
Published: June 28, 2026 ·
Source: KSAT 12 (ABC affiliate) ·
Reading time: 4 min
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Frequently asked about this story
What is this story about? A long and dangerous heat wave will blast a large swath of the central and eastern United States this week, the National Weather Service said, with temperatures rising ahead of the July Fourth holiday and feeling even hotter because of the high humidity that's arriving with it.Already, parts of t...
When was this published? This article was first published on June 28, 2026 by KSAT 12 (ABC affiliate) and curated for The San Antonio readers.
Who reported this story? This story was reported by Marc Levy, Associated Press at KSAT 12 (ABC affiliate). To learn more about how The San Antonio selects and reviews stories, see our editorial standards .
Where can I find related coverage? See more local coverage from The San Antonio, or browse our daily briefing and topic hubs .
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