WHAT: Dangerously hot and humid conditions expected Monday
through Thursday.

WHERE: Portions of central, south central, southwest, and west
central Michigan.

WHEN: From Monday afternoon through Thursday evening.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.

ADDITIONAL DETAILS: Heat and humidity will begin building in
Monday...with Tuesday through Thursday expected to be the hottest
days this week. This multi-day stretch of heat and humidity will
bring high temperatures at least in the mid 90s with overnight
lows in the mid to upper 70s. Dangerously hot conditions with heat
index values over 100 are expected with values over 110 possible...
especially Tuesday through Thursday. Hot and humid nights will
bring little to no relief from daytime heat and humidity this week.

WHAT: Dangerously hot conditions with daily heat index values
around 105 degrees expected.

WHERE: Central, south central, southwest, and west central
Michigan.

WHEN: Until 8 PM EDT Thursday.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.

ADDITIONAL DETAILS: Several days in a row of hot temperatures
with little relief from overnight low temperatures can increase
heat stress on the human body.

The Michigan Department of Environment, Great Lakes, and
Energy (EGLE) has declared an Air Quality Advisory for June 30, 2026,
for elevated levels of ozone in west and southwest Michigan.

Pollutants within those areas are expected to be in the
Unhealthy for Sensitive Groups range.

The Air Quality Alert is in effect for the following Michigan
counties:

Muskegon, Ottawa, Kent, Allegan, Van Buren, and Berrien.

Warm temperatures, ample sunlight, and southwest winds will mix with
pollutants to produce surface-level ozone in west and southwest
Michigan.

It is recommended that, when possible, you avoid strenuous outdoor
activities, especially those with heart disease respiratory
conditions like asthma. Watch for symptoms including wheezing,
coughing, chest tightness, dizziness, or burning in nose, throat, or
eyes.

People and businesses are urged to avoid activities which can lead to
ozone formation. These activities include: refueling vehicles or
topping off when refueling, using gasoline powered lawn equipment,
using charcoal lighter fluid.

Positive activities include: driving less, telecommuting, delaying
or combining errands.

For up-to-date air quality data for Michigan, visit the MiAir site:
Michigan.gov/MiAir

For up-to-date air quality data nationally, visit EPA's Air Now site:
AirNow.gov