Extreme heat to grip the Pacific Northwest with millions at risk of triple-digit temperatures

Over 10 millions Americans are under an Extreme Heat Watch, which has been issued from Tuesday morning through Thursday evening.

CALIFORNIA - Extreme heat is on the way for portions of the Pacific Northwest, with temperatures topping 100 degrees in some areas.

It comes as hundreds of thousands of visitors flock to Southern California for the FIFA World Cup.

Starting on Tuesday, temperatures are expected to climb as an intense, early-summer ridge of high pressure settles over the West Coast.

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This heat dome will trap warm air at the surface and push inland, allowing temperatures to soar.

An Extreme Heat Watch has been issued from Tuesday morning through Thursday evening, as over 10 million Americans fall under this watch, including all of Los Angeles.

The heat will be a significant departure from seasonal averages. During this time of year, in late June, temperatures typically hover around 80 degrees.

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The dangerous heat will be felt across the broader Los Angeles metro area, posing a risk to outdoor crowds in cities like Hollywood and Beverly Hills, where temperatures could jump to the upper 80s.

SoFi Stadium (Los Angeles Stadium for the World Cup) relies heavily on its translucent plastic roof canopy and open-air sides to naturally funnel in cooling Pacific Ocean breezes.

While this design will keep stadium temperatures cooler, the incoming heat could still put the venue's natural ventilation and cooling systems to the test.

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The U.S. men's soccer team will face off against Türkiye at Los Angeles Stadium on Thursday night at 10 p.m.

Compounding the issue, subtropical moisture is expected to creep northward from Baja California. 

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This increase in humidity will likely cause heat index values to climb as well, making conditions feel even more oppressive, according to the FOX Forecast Center.

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