* WHAT...Dangerously hot conditions with heat index values of 100 to 107. * WHERE...Anoka, Carver, Dakota, Hennepin, Ramsey, Scott, and Washington Counties. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Heat-related illnesses increase significantly during extreme heat and high humidity events. Prolonged heat waves lead to cumulative heat stress for those who cannot adequately cool down and recover each night. Cumulative heat stress significantly increases the risk of heat exhaustion and heat stroke as time goes on.