Health officials urge the public to be cautious as several North Texas counties are under its first Heat Advisory of the year as of 1 p.m. Wednesday.
The National Weather Service said the heat advisory, which lasts until 7 p.m. Saturday, was issued because temperatures will approach triple-digits, with heat index values reaching 109 across North Texas.
Centers for Disease Control and Prevention officials said that's hot enough to cause heat stroke.
NBC 5 Meteorologist Remeisha Shade forecasts a high Wednesday of 102 with a heat index between 105-109. Excessive heat is expected for the next week with highs well into the triple digits each day and peaking at 106 on Sunday.
Water is the cornerstone to staying safe this week, according to the CDC. Officials said it's important to start drinking before becoming thirsty.
Officials recommend staying indoors, but anyone who must be outside should drink a cup of water about every 20 minutes.
Online: Tips for Preventing Heat-Related Illness
NBC 5's Jeff Smith contributed to this report.
The latest news from around North Texas.