A Heat Advisory is in effect for Franklin County, TN and Jackson, Marshall and Dekalb Counties in Alabama until 7pm today.
An Excessive Heat Warning is in effect for Lincoln County, TN and Madison, Limestone, Morgan, Cullman, Lawrence, Lauderdale, Colbert and Franklin Counties in Alabama until 7pm.
Both mean it's going to be dangerously hot, but what's the real difference between the 2? For our area here's what it means:
Heat Advisory: Heat Indices (what it feels like with the humidity) are forecast to be between 105-110°F, and/or actual air temperatures are forecast to be between 100-105°F.
Excessive Heat Warning: Heat Indices are forecast to exceed 110°F, and/or actual air temperatures are forecast to exceed 105°F.
This criteria varies across the country. The temperature/heat index thresholds can be lower in other areas. Us Southerners are expected to tolerate the heat better since we have longer, hotter and more humid summers than other parts of the country.
WAFF 48 Storm Team