National Weather Service Updates Heat Alerts to 'Extreme' Warnings by 2025

National Weather Service Hazard Simplification

• 💡 The National Weather Service is implementing changes to how heat alerts are communicated as part of its Hazard Simplification project.
• 🎯 Similar to changes made for winter weather alerts, heat alerts are being updated to align with a more straightforward system.

New Heat Alert Terminology

• 🌡️ Previously, alerts were issued as "Excessive Heat Watch" and "Excessive Heat Warning."
• 🚨 By 2025, these will be changed to "Extreme Heat Watch" and "Extreme Heat Warning" to signify dangerously hot conditions.

Understanding Heat Advisories and Warnings

• ⚠️ An Extreme Heat Watch indicates that dangerous heat is possible, prompting preparedness measures like planning to spend time indoors.
• 🔥 An Extreme Heat Warning signifies that dangerous heat is imminent or already occurring, requiring immediate action.
• ⚡ The criteria for a Heat Advisory in Houston is an air temperature of 103°F or hotter with a heat index of 108°F or hotter.
• 📈 An Excessive Heat Warning is issued when the air temperature is 105°F or hotter and the heat index is 113°F or hotter.

The Role of Heat Index

• 🌡️ The heat index, often called "feels like" temperature, accounts for both actual air temperature and humidity.
• 💧 High humidity significantly impacts the heat index calculation, making conditions feel hotter and more dangerous.

Health Risks Associated with Heat Index

• ⚠️ Exposure to a heat index between 90°F and 103°F without breaks or hydration can lead to heat stroke, heat cramps, or heat exhaustion.
• 🚨 A heat index between 103°F and 124°F increases the likelihood of experiencing heat stroke, heat cramps, and heat exhaustion.
• 🚑 A heat index of 125°F or higher without protective measures can lead to heat stroke, which is a medical emergency.

Recognizing Heat-Related Illness Symptoms

• 🤕 Heat Exhaustion symptoms include feeling faint or dizzy, excessive sweating, cool/pale/clammy skin, rapid/weak pulse, and muscle cramps. Seek a cool place, drink water, and take a cool shower or use a cold compress.
• 🚨 Heat Stroke symptoms are a throbbing headache, no sweating, red/hot/dry skin, rapid/strong pulse, and potential loss of consciousness. This is a medical emergency requiring immediate 911 calls or hospitalization.