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.

WHAT: The Minnesota Pollution Control Agency has issued an Air
Quality Alert for fine particles pollution. The Air Quality Index
(AQI) is expected to reach the Red or Unhealthy category.

WHERE: East central, central, west central, southeast, north
central, and northwest Minnesota.

WHEN: Until 11 AM CDT Friday.

IMPACTS: Some members of the general public may experience
health effects. Sensitive groups, such as people with lung
disease (including asthma), heart disease, and children and older
adults, may experience health effects.

ADDITIONAL DETAILS: Very heavy smoke is expected across the
Arrowhead today, as large wildfires continue to spread. Hot
temperatures, when combined with the air pollution, will
exacerbate health impacts. A frontal boundary will then spread
heavy smoke further south this evening into Wednesday morning, as
it moves across northern and central Minnesota. The onset of
smoke will be rapid. This boundary eventually passes through the
Twin Cities and into southeastern Minnesota on Wednesday or
Wednesday evening, bringing heavy smoke even further south.
Additional rounds of heavy smoke are possible from Thursday
through Friday morning across the alert area.