( CNN ) -- It 's truly the dog days of summer in the South . The heat wave that has encompassed many Southern states this week is not expected to loosen its grip in the coming days . Scorching high temperatures are in the forecast over the weekend in the North . Topeka , Kansas ; Kansas City , Missouri ; Omaha , Nebraska ; and Oklahoma City are several cities under an excessive heat watch Friday through Sunday . And little relief is expected next week . An area of high pressure is anticipated to circulate hot and humid air over much of the central and eastern part of the country , the National Weather Service said in a statement Thursday night . `` Heat index values in excess of 110 degrees are likely , '' it said . Extreme heat indices -- how the air feels , with heat and humidity -- are expected to reach up to 116 degrees in Minneapolis next week . `` These are extreme out-of-the-ordinary temperatures for Minnesota , '' CNN meteorologist Sean Morris said . Dallas , Fort Worth , Arlington and other areas in Texas experienced afternoon heat indices of 105 degrees or more through Thursday . The month of June was the hottest recorded for Texas since 1895 , according to the National Weather Service . Lawton , Oklahoma , and Wichita Falls , Texas , shot past the 100 mark for the area 's 16th consecutive day of triple-digit heat Thursday . In Oklahoma City , forecasters are calling for nearly another full week of temperatures near or above 100 degrees , threatening to break a 1936 record for 22 consecutive days of such heat . The heat has driven up the demand for water and shrunk soil , resulting in low water pressure and burst pipes in Oklahoma City . Officials issued mandatory water-use restrictions for the first time in at least a decade , according to utilities department spokeswoman Debbie Ragan . More than 200 people have suffered from heat-related emergencies in Tulsa and Oklahoma City since June 17 , when the agency issued its first heat alert , said Lara O'Leary , spokeswoman for the Emergency Medical Services Authority of Oklahoma . Forecasters say people should limit outdoor activity during the hottest times of day , wear lightweight clothing , drink plenty of water and watch for signs of heat exhaustion , which include heavy sweating , pale and clammy skin , a weak pulse , fainting and vomiting . At the peak of the past week 's heat wave , more than 20 states from the Plains to the Northeast were under heat advisories .
Heat wave hit many southern states this week . Very high temperatures are in the forecast over the weekend in the North . Little rain is expected next week . Extreme heat waves are expected to reach up to 116 degrees in July .