Texas’ heat index could reach 125 degrees over the next 30 years, study finds

The city, state and national flags fly over city hall in Rio Grande City on June 17, 2021. Starr County, of which Rio Grande City is the seat, has more 100-degree days than any other county in Texas, according to a new study. (Credit: Jason Garza for The Texas Tribune)

Texans can expect a greater annual number of dangerous days of heat — when the heat index crosses 100 degrees — according to a study predicting the ramifications of climate change.

Those living along the eastern and southern border will see the highest temperatures the most days, the study by the First Street Foundation said. The most dire prediction: The heat index will reach 125 degrees at least once per year within the next 30 years in most Texas counties. Heat index is the temperature felt by the human body when relative humidity is combined with the air temperature.