Heat index alert issued for Valley

HARLINGEN — A strong high-pressure system over Deep South Texas today will deliver temperatures from the low to mid-90s on the coast to plus-100 inland.

National Weather Service forecasters have issued a heat alert, saying heat index values will range between 103 and 109 degrees today.

The alert area covers Cameron, Willacy, Hidalgo, Starr, Brooks, Zapata, Jim Hogg and Kenedy counties.

The high temperatures are combining with dew points in the 60s and 70s to produce the reading on the heat index, also known as the feels-like temperature.

People planning on outdoor activities today should hydrate, wear lightweight and light-colored clothing, and take frequent breaks from the heat.

Young children and pets should never be left unattended in vehicles, but this is especially true during hot weather when car interiors can reach lethal temperatures in a matter of minutes.

Temperatures for the rest of the week will range from the mid-90s along the coast to as high as 108 degrees in the Upper Valley.

From Wednesday through Friday, there will be a 20 percent change of thunderstorms each day.