Extreme Heat Warning

* WHAT...Dangerously hot conditions with heat index values up to 100. Overnight temperatures remaining very warm in the mid 70s.

* WHERE...Anoka, Carver, Dakota, Hennepin, Ramsey, Scott, and Washington Counties.

* WHEN...Until 9 PM CDT Thursday.

* 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.