From Harlingen, Texas: Temperatures are expected to remain high, combining with humidity to create a strong heat index. This will particularly affect certain areas, where the heat index may reach extremely high levels. A heat advisory has been issued for two counties, Willacy and Cameron, due to these conditions.

Further information is available from the source. The heat index is expected to be very high, potentially reaching levels of 111-115 in some areas. The National Weather Service has taken action in response to the high temperatures.