safety
Dangerous heat dome to scorch swathes of the U.S. this week, forecasters warn
By CBS Miami at CBS4 Miami
· June 30, 2026
· 4 min read
A long and dangerous heat wave will blast a large swath of the 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.A heat dome is expected to build over the
Key takeaway , expected to see record highs into the 100s, according to CBS News meteorologist Nikki Nolan.
Why this matters in The Miami
Miami residents can expect to feel the effects of the heat dome, even if the city itself is not under an extreme heat warning. The high humidity that comes with the heat wave will make temperatures feel even hotter, posing a risk to vulnerable populations such as the elderly and young children. As the heat index rises, residents in neighborhoods like Little Havana and Wynwood should take precautions to stay cool, especially during outdoor activities. The city's proximity to the water may provide some relief, but the heat index could still reach dangerous levels, particularly in areas with limited access to air conditioning or shade. Miami-Dade County Public Schools and local community centers may need to take extra measures to protect students and residents from the heat, and residents should be aware of the risks of heat-related illnesses.
About this story
Original reporting by CBS4 Miami . The Miami 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 CBS4 Miami . Have a tip or correction? Contact our newsroom .
Category: safety ·
Published: June 30, 2026 ·
Source: CBS4 Miami ·
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 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.A heat dome is expected to build over the
When was this published? This article was first published on June 30, 2026 by CBS4 Miami and curated for The Miami readers.
Who reported this story? This story was reported by CBS Miami at CBS4 Miami. To learn more about how The Miami selects and reviews stories, see our editorial standards .
Where can I find related coverage? See more safety coverage from The Miami, or browse our daily briefing and topic hubs .
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