* WHAT...Dangerously hot conditions with temperatures up to 101 expected. * WHERE...Central Willamette Valley. * WHEN...From noon Monday to 9 PM PDT Thursday. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...The hottest temperatures are expected Tuesday and Wednesday. Considerable uncertainty surrounds temperatures on Thursday. Overnight lows in the mid to upper 60s in the Salem Metro will provide little relief for those without air conditioning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.