Most of the Rio Grande Valley will be under a heat advisory Thursday

From the National Weather Service in Brownsville

Cameron, Hidalgo and Willacy counties will be under a heat advisory from 1 to 7 p.m. Thursday. Near record temperatures combined with elevated daytime humidity will produce dangerously high heat indices, according to the National Weather Service in Brownsville.

Temperatures will feel like they are between 111 and 115 degrees.

Rio Grande City (102 degrees) and McAllen (101) are expected to reach triple-digit high temperatures. Brownsville will be 97 and South Padre Island 86.

From the National Weather Service in Brownsville