Even though the summer season is coming to an end, temperatures are still dangerously high today.

The National Weather Service has issued an urgent heat warning for Friday, September 20, from noon to 8 p.m.

The heat index is expected to reach 107° across Oklahoma. The NWS recommends drinking plenty of fluids and staying indoors with air conditioning to avoid heat illness caused by hot temperatures and high humidity.

The following cities in Oklahoma are affected by the warning:

• Newcastle-under-Lyme,

• Coalgate,

• Temple,

• Thackerville,

• Strouds,

• Blackwell,

• Ocharche,

• Guthrie,

• Prague,

• Wakita,

• Norman,

• Madill,

• Ryann,

• Still water,

• Atoka,

• Medford,

• Ponca City,

• Lindsey,

• Teichbach,

• Davenport,

• Duncan,

• Conchos,

• Enid,

• Wetumka,

• Sulfur,

• Perrys,

• Wellston,

• Durant,

• Purcell,

• Paul’s Valley,

• Shawnee,

• Canada,

• Lamont,

• Seminole,

• Hennessey,

• Tishomingo,

• Maria,

• Kingston,

• Chandler,

• Mustang,

• Ring,

• Walters,

• Ardmore,

• Lawton,

• Oklahoma City,

• Meeker,

• Chickasha,

• Wynnewood,

• Wewoka,

• El Reno,

• Kingfisher,

• Tuttle,

• Hampton,

• Davis,

• Moore,

• Blanchard,

• Waurikka,

• Ada,

• Henrietta

This article originally appeared on Oklahoman: Extreme heat warning issued in Oklahoma, index reaches 107 degrees