LANCASTER – Our region is under a heat advisory today and an excessive heat warning for tomorrow. Hot and humid conditions will make it feel between 100-105 degrees today. Tomorrow, the heat index values will be up to 110. The excessive heat will significantly increase the risk for heat related illnesses, particularly for those who work outside or participate in outdoor activities. The oppressive heat may be life threatening to the elderly and those in poor health. Make sure you have access to air conditioned areas this week. The excessive heat conditions are expected to continue into Friday.. Relief from the heat is expected over the weekend.