Understanding Heat Advisories and Excessive Heat Warnings Across the US

Heat Alerts Explained

• 🌡️ A heat advisory is issued when heat is expected to be at dangerous levels, with criteria of temperatures 103°F or higher, or a heat index of 105°F or higher.
• ⚠️ An excessive heat warning is a step up, issued for temperatures 105°F or higher, or a heat index of 110°F or higher.
• ⏰ These alerts are typically issued 12 to 24 hours in advance, with today's heat advisory having been issued yesterday.

Regional Heat Intensity

• 🔥 The most intense heat today is concentrated along the Mississippi Valley, affecting areas from Jackson to Memphis and St. Louis.
• 📈 These regions are under extreme heat warnings, with temperatures in the mid-90s and a heat index approaching 110°F.
• 🌎 While North Texas is experiencing a heat advisory, other areas like the Great Lakes and Northeast have different criteria due to varying infrastructure and heat tolerance.
• ❄️ Regions like the Northeast do not handle heat as well as areas like North Texas.