Overview

• Temperatures in Miami reached the low 90s Fahrenheit before noon, with heat advisories in effect.
• Excessive heat warnings cover northeastern Texas, Oklahoma, northern Louisiana, and most of Arkansas.
• Cooling centers have been opened in cities like Dallas, Houston, and Memphis to provide relief.
• Meteorologists attribute the extreme heat to a high-pressure 'heat dome' over the southern Gulf of Mexico.
• Public advised to stay hydrated, wear light clothing, and check on vulnerable individuals and pets.