Much of the Rio Grande Valley will be under an excessive heat warning today

From the National Weather Service in Brownsville

Parts of Cameron, Hidalgo and Willacy counties will be under an excessive heat warning Friday, according to the National Weather Service in Brownsville. The rest of the Valley will be under a heat advisory.

By 4 p.m., temperatures will feel like 116 degrees in Brownsville and McAllen and 117 in Raymondville. Similar temperatures are expected Saturday.

A warning is issued once “feels like” temps hit 115 degrees. This specific advisory warns that heat stroke can happen quickly and can be deadly for those who have not hydrated properly and have been outdoors for prolonged periods of time.

High temperatures around the Rio Grande Valley include 108 in Rio Grande City, 104 in McAllen, 102 in Harlingen and 100 in Brownsville. There is a 20 percent chance for rain.

From the National Weather Service in Brownsville