"Excessive heat warning" defined

For those of you who are curious yellow about what an excessive heat warning really means, here it is:
Excessive Heat Warning - Extreme heat index making it feel very hot, typically above 110 °F (43 °C) for 3 hours or more during the day for two consecutive days or above 110 °F (43 °C) at any time. 
Yep, that's what we're looking at. BoomerGirl's bitchy mood officially begins now. Good times!