GOOD AFTERNOON THOSE OF YOU AT HOME. WELCOME TO WCCO.COM, LIVE FROM THE STATE FAIR. >> WE WANT TO BEGIN TODAY WITH NEW INFORMATION ON WEST NILE VIRUS CASES IN OUR REGION. IT HAS KILLED TWO IN WISCONSIN AND SENT ANOTHER TO THE HOSPITAL. IN ADDITION, THREE PEOPLE TESTED POSITIVE FOR THE VIRUS. WEST NILE IS TRANSMITTED BY MOSQUITOES AND IT SHOWS US LATE SUMMER IS WHEN CASES PEAKED. >> IT HAS BEEN TERRIBLE. WE FINISHED OUR BASEMENT, SO I WOULD MAKE SURE NOTHING WAS COMING UP. >> Reporter: UNLIKE THE LAST YEARS, THERE IS NO SHORTAGE OF RAIN AND WHEREVER THERE IS STANDING WATER, THERE IS BOUND TO BE MOSQUITOES. >> WHEN I AM GOLFING, I THINK ABOUT IT AND I SPRAY MYSELF. >> Reporter: THAT IS THE FIRST STEP TOWARDS PROTECTING YOURSELF AGAINST WEST NILE VIRUS, WHICH -- IN CASES OF INFECTED PEOPLE , THEY ARE ON THE RISE. >> AT THE END OF THE SUMMER, WHEN THE RISK IS AT ITS HIGHEST >> Reporter: ALEX CARLSON IS A SPOKESPERSON FOR THE METROPOLITAN MOSQUITO CONTROL DISTRICT. EVEN AS THE NUMBER OF BUGS DECREASE, THE THREAT IS STILL REAL. >> ONE FAMILY CARRIES WEST FILE -- WEST NILE, AND THEY ARE CONTAINER BREATHING. THEY LIKE MAN-MADE HABITATS. >> ABOUT 20% OF THOSE INFECTED SHOW SYMPTOMS, BUT WEST NILE CAN CAUSE SERIOUS ILLNESS FOR SOME PEOPLE. MOST VULNERABLE ARE ADULT OVER THE AGE OF 60 AND THOSE WITH COMPROMISED IMMUNE SYSTEMS. >> IT LOOKS LIKE A FLU. YOU GET SOME FEVER AND NAUSEA AND HEADACHES AND FATIGUE >> Reporter: THE CULEX MOSQUITO WILL BE AROUND AS LONG AS TEMPERATURES REMAINED WARMING UP, WHICH MEANS EVEN IN THE FALL, THEY RECOMMEND KEEPING THE BUG REPELLENT HANDY. >> HIGH SCHOOL FOOTBALL GAMES, IF YOU'RE ENJOYING THE EVENING, PUT ON THE BUG SPRAY AND COVER UP AS MUCH AS YOU CAN AND JUST AVOID MOSQUITO BITE AS MUCH AS POSSIBLE. >> Reporter: