Extreme HeatRisk Forecast to Reach the Tri-State Next Week

Summer heat is one thing.

A prolonged stretch of dangerous heat that gets worse with each passing day is something else entirely.

Beginning Saturday, June 27, the Evansville area is expected to see temperatures increase into Major (Level 3) HeatRisk.

The concern doesn't end there.

According to the National Weather Service's HeatRisk forecast, much of the Tri-State is expected to reach the Major (Level 3) category by Monday or Tuesday. By Thursday, much of the region is forecast to move into the Extreme (Level 4) category, the highest on the HeatRisk scale.

That means the danger isn't just the heat itself. It's the fact that it will continue building for several days.

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Why This Heat Event is Different

One of the biggest concerns isn't simply the daytime temperatures.

It's the fact that overnight temperatures are expected to stay unusually warm, giving your body very little opportunity to recover before the next day's heat arrives.

Roads, sidewalks, buildings, and homes continue releasing heat well after sunset, making it harder for both people and pets to cool down overnight.

The prolonged exposure significantly increases the risk of heat-related illnesses as the week goes on.

Read More: Protect Yourself Against Heat-Related Illness

The HeatRisk Scale Reaches Its Highest Level

The National Weather Service uses a color-coded HeatRisk system to show how dangerous prolonged heat may become.

• Yellow/Minor (Level 1): Heat may affect unusually sensitive individuals
• Orange/Moderate (Level 2): Heat becomes more dangerous to sensitive groups during prolonged exposure
• Red/Major (Level 3): Dangerous heat can affect anyone without proper hydration or access to cooling
• Purple/Extreme (Level 4): Rare, prolonged heat where the risk of heat-related illness becomes significant for everyone

Forecasts currently show the Tri-State progressing through the higher HeatRisk categories during the upcoming week, with Extreme (Level 4) conditions possible by Thursday.

Biserka Stojanovic

Heat Index Values Above 105° Can Become Dangerous Fast

The Evansville Climate Collective points out that once the heat index exceeds 105 degrees, the risk of heat exhaustion and heat stroke increases rapidly after 15 minutes of exposure.

Officials recommend:

• Drink water throughout the day, even before you feel thirsty
• Spend as much time as possible in air-conditioned buildings
• Limit outdoor activities during the afternoon and early evening
• Postpone strenuous outdoor work or exercise whenever possible

Read More: These Common Medications Can Make the Heat More Dangerous

Check on Others During the Heat

Extreme heat can be especially dangerous for:

• Older adults
• Young children
• People with chronic health conditions
• Outdoor workers
• Anyone without reliable air conditioning

Checking on neighbors, family members, and friends during prolonged heat events is one of the simplest ways to help keep your community safe.

Don't Forget About Your Pets

Our pets will be feeling this heat, too.

Make sure they have:

• Plenty of fresh water
• Access to shade
• A cool place to rest

And never, ever leave children or pets inside a parked vehicle. Even with the windows cracked, the temperatures inside the vehicle can become deadly in just a matter of minutes.

The community is encouraged to continue monitoring conditions through Heat.gov and the National Weather Service's HeatRisk forecast as this prolonged heat even develops throughout next week.