St. Louis City County, MO
Alerts
Alerts are listed in order of start time and level of severity. Click on the alert title to read details for each alert.
In effect from Tuesday 09/15 11:00 AM CDT – Tuesday 09/15 7:00 PM CDT
Issued by NWS St Louis MO
What
Heat index values up to 109 expected.
Where
Portions of south central and southwest Illinois and central, east central, and southeast Missouri.
When
From 11 AM this morning to 7 PM CDT this evening.
Impacts
Hot temperatures and high humidity may cause heat illnesses.
What to Do
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668.
Areas Impacted
- Bond
- Clinton
- Marion
- Washington
- Randolph
- Madison
- St. Clair
- Monroe
- Moniteau
- Cole
- Osage
- Gasconade
- Warren
- St. Charles
- Franklin
- St. Louis
- St. Louis City
- Jefferson
- Crawford
- Washington
- St. Francois
- Ste. Genevieve
- Iron
- Madison
- Reynolds
Tips to Stay Safe
A Heat Advisory means dangerous heat conditions are happening now or soon. Take action before, during and after the heat to stay safe.
- Stay in air-conditioned spaces if possible. Find cooling centers or places with AC in your community that you can go to, like libraries or shopping malls.
- Stay hydrated and stock up on clean drinking water to get you through multiple days of heat.
- Reschedule outdoor activities for cooler times of the day, and take breaks in the shade or air conditioning.
- Cover windows with curtains or shades, or use window reflectors designed to reflect heat back outside.
- Check on friends, family, and neighbors, especially those who do not have air conditioning or spend much of their time alone.
Make sure you know the signs of heat-related illness and how to respond.
Briefing
From the Forecaster
Heat Returns, Strong Storms Possible Tuesday
Created by the NWS St Louis WFO
Summer-like heat and humidity returns Tuesday for much of the region, though north of I-70 storms and cloud cover may keep this heat in check. Keep an eye out for a few stronger thunderstorms Tuesday afternoon as well.
Seven-day Weather Risk Overview
The graphic shows the daily risk summary for 7 days. Daily risk is based on highest risk factor for that day.
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