I never thought it would happen to me. Lara O’Leary, the Emergency Medical Services Authority’s spokeswoman, has heard that statement uttered more times than she can count from people with heat-related ailments. "There needs to be more active involvement for protection, wearing sunscreen, drinking water and staying in the shade,” O’Leary said. "You have to be more vigilant of what your body is telling you.” Although the weather is not any hotter than last year at this time, the beginning of the summer season always catches people off-guard, said Rick Smith, warning coordination meteorologist for the National Weather Service in Norman. "People are not accustomed to it yet, and that’s where a lot of the illnesses come from, versus those in July and August,” he said. A tolerance to the heat can slowly be built by doing a majority of necessary work or exercise outside in the morning, before 10 a.m., as it doesn’t take long for heat to build once the sun rises. Early morning temperatures are still in the lower- to mid-70s, Smith said. Neither Oklahoma City nor Tulsa had an excessive heat advisory Monday, but three heat-related injuries were reported. Oklahoma City has yet to report more than three heat-related injuries in one day. A heat advisory is triggered if there are at least five heat-related injuries in a day. But danger exists even before an official statement is made, with temperatures expected to climb above 100 degrees today. On average, the Emergency Medical Services Authority has been responding to one to three calls a day. That’s down from recent years, when the norm was three to five. Even the mornings can be dangerous. An 80-year-old man collapsed Friday after a morning bicycle ride, O’Leary said. "He thought it would be cooler, but the heat overcame him,” she said. "If you’re going to ride a bike, do yard work, play baseball or exert yourself more than a general stroll, it’s important to hydrate hours before you head out, as well as taking frequent breaks.” Drink 8 ounces of water an hour and wear light-colored clothing, she said. Cool off by going to the mall, library or a movie. Now is not the time to try to cut usage of air conditioning to save on energy, O’Leary said. Free fans are available for some people who don’t have air conditioners or who can’t afford to run theirs. Fans are distributed by the Salvation Army, 501 S Harvey Ave., from 9 a.m. to noon and 1 to 3:30 p.m., Monday through Friday. Eligible recipients are families with a child 6 months or younger, as well as senior citizens 65 and older. Disabled senior citizens can get fans from 9 a.m. to noon Friday. People who need to cool off with cold water and air conditioning can go to the Salvation Army’s Red Shield Kitchen, 330 SW 4 from noon to 3 p.m. The cooling station reopens from 5 to 7 p.m. A good indicator of dangerous conditions is the heat index, which is the temperature the body feels when heat and humidity are combined, according to the National Weather Service. Sweating cools the body through evaporation, but high relative humidity retards evaporation and robs the body of its ability to cool itself. On Monday in Stillwater, it felt like 108 degrees. In parts of Oklahoma City today, the index is expected to reach 110.