Douglas County and nearly all of eastern Kansas will be under a heat advisory from noon to 8 p.m. Tuesday.

The National Weather Service in Topeka issued the advisory, which warns of high temperatures approaching 100 degrees and heat index values up to 110 degrees.

More from the weather service:

A heat advisory means that a period of hot temperatures is expected. The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible. Drink plenty of fluids…Stay in an air-conditioned room…Stay out of the sun…And check up on relatives and neighbors. 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 light weight and loose fitting clothing when possible and drink plenty of water. 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.