* WHAT. Dangerously hot conditions with heat index values up to 100 possible. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. From Monday afternoon through Friday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. Heat index values near 100 degrees will have a cumulative affect through the course of the week. Temperatures at night will only fall into the 70s. So, the affect of the heat will build through the course of the week.

* WHAT. Dangerously hot conditions for several days are expected. Peak afternoon heat indices of 95 to 100 degrees are possible each day from Monday through Friday. * WHERE. Southeast Michigan * WHEN. From Monday afternoon through Friday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. The effects of heat on the human body get worse as the number of consecutive days of heat increase. Nighttime lows will only drop into the 70s this week, which will offer little relief from the heat.

* WHAT. Highest gusts up to 25 kts from the south and highest waves around 4 feet expected. * WHERE. Sturgeon Pt to Alabaster MI. * WHEN. From noon Sunday to 2 AM EDT Monday. * IMPACTS. Conditions will be hazardous to small craft.