Millions Warned to Avoid Coffee, Heavy Meals Amid Extreme Heat

Scorching temperatures in the Southwest prompt health advisories to prevent dehydration and heat-related illnesses.

Mar. 19, 2026 at 9:35am

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Millions of Americans in the Southwest are facing extreme heat warnings, with temperatures soaring well above average and into the 100s. Authorities are advising residents to abstain from caffeine and heavy meals, which can contribute to dehydration and increased body temperature during the intense heatwave expected to last through the weekend.

Why it matters

The prolonged and record-breaking heat poses serious health risks, especially for vulnerable populations. Providing clear guidance on dietary and hydration habits can help prevent heat-related illnesses and ensure public safety during this extreme weather event.

The details

According to reports, the heatwave is being driven by a stubborn 'heat dome' that is bringing temperatures up to 30 degrees above average for this time of year. Residents in southern Nevada, southern California, and Arizona are being warned to avoid coffee, caffeinated beverages, and protein-heavy meals, as these can accelerate dehydration. Authorities are also reminding people not to leave young children unattended in cars.

  • The heatwave is expected to last through the weekend and into early next week.
  • On Tuesday, over 60 record temperatures were hit, with Palm Springs, California reaching 103°F.
  • Phoenix, Arizona hit 100°F on Wednesday, the earliest the city has ever reached that temperature.

The players

Tyler Roys

AccuWeather senior meteorologist who stated that the 'heat dome' driving the extreme temperatures is 'not just early and intense — it is stubborn.'

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What they’re saying

“This heat dome is not just early and intense — it is stubborn. A multiday stretch of extreme heat significantly increases the risk of heat-related illnesses.”

— Tyler Roys, AccuWeather senior meteorologist

What’s next

Authorities will continue to monitor the situation and provide updates on the duration and severity of the heatwave. Residents are advised to heed all warnings and take precautions to stay safe and hydrated.

The takeaway

This extreme heat event underscores the importance of public health preparedness and community resilience in the face of the growing threat of climate change-driven weather patterns. Providing clear guidance on how to stay safe during prolonged heatwaves is crucial to protecting vulnerable populations.