As thousands flocked to experience the first weekend of the Clark County Fair on Saturday, the temperature in Vancouver rose to a record 103 degrees. The scorching temperatures helped cause heat-related illnesses for some fairgoers and prompted warnings from experts about the dangers associated with hot weather.NWS meteorologist Liana Ramirez said the higher-than-forecast temperatures are a result of a stronger flow of hot interior air from east of the CascadeRange. Such “offshore” flows of air bring hot weather to Western Washington and Oregon. The previous record high for Aug. 4 was 99 degrees in 1952.Saturday was the first time in more than three years that temperatures reached 100 degrees, Columbian weather blogger Steve Pierce said. The last time it happened was July 29, 2009, when the temperature was 108 degrees — the highest ever recorded at Pearson Field.Saturday’s extreme heat translated into several instances of heat-related health problems at the Clark County Fair.By late afternoon, a couple of people had been sent to the emergency room, said Danielle Coates, a registered nurse for PeaceHealth Southwest Medical Center. Coates was working at the fair’s first aid booth on Saturday, and said a few people passed out from dehydration in the heat.Others were showing different signs of dehydration, including headaches and vomiting, said Clark County Fire District 6 firefighter Shawn Richey. His crew had received seven calls for heat-related health problems by about 4:30 p.m. Saturday, “but the day is still young,” he added. Many of the problems arose after 3 p.m., when the effects of peak temperatures were beginning to take their toll.