(Lincoln, IL) — Hot and humid conditions will really ramp up today and Saturday as temperatures soar into the 90s. The high temperatures combined with high humidity levels will result in dangerous Heat Index values of between 105 to 113 degrees for both days. Temperatures on Sunday will be slightly cooler due to more cloud cover and scattered thunderstorm activity, especially during the afternoon and evening. Take precautions when outdoors, stay hydrated and for more information on extreme heat safety tips visit www.weather.gov.