"Record-Breaking Heat Wave Grips Florida and Texas, Relief in Sight?"

Excessive heat warnings are in effect in Florida, with "feels like" temperatures reaching up to 115 degrees. The National Weather Service (NWS) has issued warnings and advisories across different regions of the state, urging people to stay in air-conditioned spaces, stay hydrated, and take precautions. Heat-related deaths have been on the rise in Florida, and the NWS uses heat index values to determine the severity of the heat. The heat index combines temperature and humidity levels to indicate what the temperature actually feels like outside. Additionally, the NWS also uses the Wet Bulb Globe Temperature (WBGT) to measure heat stress for outdoor workers and athletes.