Heat Advisory in effect from noon until 9 p.m.

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ST. LOUIS, MO (KTVI)- The oppressive and dangerous heat expected today will likely make for changes in how people plan their day.

FOX 2's Chris Regnier is live in Maryland Heights with how outdoor activities could be impacted by the heat.

According to the National Weather Service, a Heat Advisory remains in effect from noon Wednesday until 9 p.m. Temperatures will rise quickly into the 90's by midday, with dangerous levels of heat during the afternoon and evening.

The temperature could hit 100 degrees for the first time this summer. The combination of hot temperatures and high humidity will likely lead to an increased risk of heat-related stress and illness.

Children,the elderly and those without air conditioning and those participating in strenuous outdoor activities will be the most susceptible.

Car interiors can reach lethal temperatures in a matter of minutes.

This is also Missouri Summer Safety Week and the heat rules are definitely in effect today. Make sure to stay hydrated and don`t leave children and pets in hot cars.

There should be a little relief tomorrow with temperatures falling back into the mid 90's.

For cooling sites near you visit: 211helps.org/Heating-Cooling-Sites.aspx