Chicago Heat Advisory Extended: Thursday's Excessive Heat Index Forecast

Michael

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Post on Jul 25, 2025

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Chicago Heat Advisory Extended: Dangerous Heat Index Forecast for Thursday

Chicago, IL – The National Weather Service has extended the Heat Advisory for the Chicago metropolitan area, warning residents to brace for another day of dangerously high temperatures and humidity. The excessive heat index, a measure of how hot it feels when humidity is factored in, is expected to reach well into the dangerous range on Thursday, prompting concerns for public health and safety.

This extension follows Wednesday's sweltering conditions, which saw numerous heat-related illnesses reported across the city. The prolonged heatwave underscores the importance of taking precautions to avoid heatstroke and other heat-related emergencies.

Thursday's Forecast: Dangerously High Heat Index

The National Weather Service predicts a high temperature of around 90°F (32°C) on Thursday, but the heat index – that crucial combination of temperature and humidity – is forecast to soar to between 105°F and 110°F (41°C and 43°C). This level of heat poses significant risks, especially for vulnerable populations such as the elderly, young children, and individuals with pre-existing health conditions.

What to Expect and How to Stay Safe:

• High Heat Index: Be prepared for a heat index exceeding 105°F (41°C) throughout much of the day. This feels significantly hotter than the actual air temperature.
• Increased Risk of Heat-Related Illnesses: Heatstroke, heat exhaustion, and heat cramps become increasingly likely under these conditions. Stay vigilant and seek medical attention if symptoms develop.
• Limited Outdoor Activities: The NWS strongly advises limiting strenuous outdoor activities to the early morning or evening hours when temperatures are slightly cooler.

Protecting Yourself and Others from the Heat:

Staying safe during extreme heat requires proactive measures:

• Stay Hydrated: Drink plenty of water throughout the day, even before you feel thirsty. Avoid sugary or alcoholic beverages.
• Seek Air Conditioning: Spend time in air-conditioned spaces whenever possible. Libraries, shopping malls, and community centers often offer refuge from the heat.
• Wear Light Clothing: Choose loose-fitting, light-colored clothing to reflect sunlight and stay cool.
• Check on Vulnerable Individuals: Reach out to elderly neighbors, family members, and friends to ensure they are staying safe and hydrated.
• Never Leave Children or Pets in Vehicles: Temperatures inside parked cars can rise rapidly, even on mildly warm days, posing a deadly risk.
• Know the Signs of Heatstroke: Symptoms include high body temperature (above 103°F), confusion, seizures, and loss of consciousness. Seek immediate medical attention if you suspect heatstroke. .

Cooling Centers Available:

The City of Chicago is providing cooling centers throughout the city to help residents escape the heat. You can find a list of cooling center locations .

Staying Informed is Key:

Continue to monitor weather forecasts and advisories from the National Weather Service. Be prepared for the extended heat and take necessary precautions to protect yourself and your loved ones. This dangerous heat is expected to last through Thursday, so vigilance is crucial for everyone in the Chicago area. Your health and safety are paramount during this heatwave.