Fuente de datos: National Weather Service (NWS) Última verificación: 19 de julio de 2026

Calor extremo

Nota: Los detalles de las alertas del National Weather Service se muestran a continuación en inglés (idioma original de la fuente). Los encabezados, categorías y resumen están en español.

Heat Advisory (AVISO) - expira July 19, 2026 at 6:30 PM EDT

Áreas afectadas: Clinton; Washington; Randolph; Madison; St. Clair; Monroe; Boone; Moniteau; Cole; Osage; Callaway; Montgomery; Gasconade; Warren; St. Charles; Franklin; St. Louis; St. Louis City; Jefferson; Crawford; Washington; St. Francois; Ste. Genevieve; Iron; Madison; Reynolds

Heat Advisory issued July 19 at 2:23AM CDT until July 21 at 7:00PM CDT by NWS St Louis MO

• WHAT...Heat index values up to 105.

• WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri.

• WHEN...Until 7 PM CDT Tuesday.

• IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Qué hacer: 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.

Fuente: NWS St Louis MO

Heat Advisory (AVISO) - expira July 19, 2026 at 6:00 PM EDT

Áreas afectadas: Jefferson; Perry; Franklin; Hamilton; Jackson; Williamson; Saline; Gallatin; Union; Johnson; Pope; Hardin; Alexander; Pulaski; Massac; Fulton; Hickman; Carlisle; Ballard; McCracken; Graves; Livingston; Marshall; Calloway; Crittenden; Lyon; Trigg; Caldwell; Union; Webster; Hopkins; Christian; Muhlenberg; Todd; Perry; Bollinger; Cape Girardeau; Wayne; Carter; Ripley; Butler; Stoddard; Scott; Mississippi; New Madrid

Heat Advisory issued July 19 at 1:26AM CDT until July 21 at 7:00PM CDT by NWS Paducah KY

• WHAT...Heat index values between 100 to 105 expected.

• WHERE...Portions of southern Illinois, western Kentucky, and southeast Missouri.

• WHEN...Until 7 PM CDT Tuesday.

• IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

• ADDITIONAL DETAILS...Higher humidity levels combined with hot temperatures on Tuesday may cause heat index values to near 110 degrees.

Qué hacer: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Fuente: NWS Paducah KY

Calidad del aire

Air Quality Alert (AVISO) - expira July 20, 2026 at 4:00 AM EDT

Áreas afectadas: Knox; Stark; Peoria; Marshall; Woodford; Fulton; Tazewell; McLean; Schuyler; Mason; Logan; De Witt; Piatt; Champaign; Vermilion; Cass; Menard; Scott; Morgan; Sangamon; Christian; Macon; Moultrie; Douglas; Coles; Edgar; Shelby; Cumberland; Clark; Effingham; Jasper; Crawford; Clay; Richland; Lawrence

Air Quality Alert issued July 19 at 2:57AM CDT by NWS Lincoln IL

The Illinois Environmental Protection Agency in Springfield Illinois has issued a Air Quality Action Day for ground level ozone and fine particulates, until midnight CDT tonight.

An Areawide Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are forecast to be at OR ABOVE the Unhealthy for Sensitive Groups (USG) category in all or nearly all Illinois AQI forecast sectors.

Areas both inside and outside of the Action Day coverage area may experience smoke/PM2.5 today into tonight. Those with air quality concerns or anyone in Illinois with outdoor plans is encouraged to check current NowCast readings or sign up for EnviroFlash alerts on AirNow.gov. Before going outside, checking the NowCast AQI will help identify periods of both poor and cleaner air quality regardless of the level of the daily forecasted AQI.

AQI Category Guidance Unhealthy for Sensitive Groups (USG) - Members of sensitive groups may experience health effects. The general public is less likely to be affected. Sensitive groups: Make outdoor activities shorter and less intense. Its OK to be active outdoors, but take more breaks. Watch for symptoms such as coughing or shortness of breath. People with asthma: Follow your asthma action plan and keep quick relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Unhealthy - Sensitive groups: Avoid long or intense outdoor activities. Consider rescheduling or moving activities indoors. Everyone else: Reduce long or intense activities. Take more breaks during outdoor activities.

Media Contact... Illinois EPA

Fuente: NWS Lincoln IL

Air Quality Alert (AVISO) - expira July 20, 2026 at 3:30 AM EDT

Áreas afectadas: Greene; Macoupin; Montgomery; Fayette; Adams; Brown; Pike

Air Quality Alert issued July 19 at 2:26AM CDT by NWS St Louis MO

The Illinois Environmental Protection Agency in Springfield Illinois is forecasting unhealthy conditions for sensitive groups (USG) for fine particulates due to smoke until midnight CDT tonight.

Active children and adults, especially people with pulmonary or respiratory disease such as asthma, should limit prolonged outdoor activity.

Residents are urged to reduce pollution levels. Air quality forecasts and tips on how you can reduce your emissions can be found at www.airnow.gov.

Media Contact...217 558 1536.

Fuente: NWS St Louis MO

Air Quality Alert (AVISO) - expira July 20, 2026 at 1:15 AM EDT

Áreas afectadas: Winnebago; Boone; McHenry; Lake; Ogle; Lee; De Kalb; Kane; DuPage; La Salle; Kendall; Grundy; Kankakee; Livingston; Iroquois; Ford; Northern Cook; Central Cook; Southern Cook; Northern Will; Southern Will; Eastern Will

Air Quality Alert issued July 19 at 1:06AM CDT by NWS Chicago IL

The Illinois Environmental Protection Agency has issued an Areawide Air Pollution Action Day for today, July 19th for portions of Illinois.

An Areawide Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are forecasted to be at or above the Unhealthy for Sensitive Groups (USG) category in all or nearly all Illinois AQI forecast sectors.

Areas both inside and outside of the Action Day coverage area may experience smoke/PM2.5 to a varying degree and duration today. Those with air quality concerns or anyone in Illinois with outdoor plans are encouraged to check current NowCast readings or sign up for EnviroFlash alerts on AirNow. gov. Before going outside, checking the NowCast AQI will help identify periods of both poor and cleaner air quality regardless of the level of the daily forecasted AQI.

AQI Category Guidance Unhealthy for Sensitive Groups (USG) - Members of sensitive groups may experience health effects. The general public is less likely to be affected. Sensitive groups: Make outdoor activities shorter and less intense. Its OK to be active outdoors, but take more breaks. Watch for symptoms such as coughing or shortness of breath. People with asthma: Follow your asthma action plan and keep quick relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Unhealthy - Sensitive groups: Avoid long or intense outdoor activities. Consider rescheduling or moving activities indoors. Everyone else: Reduce long or intense activities. Take more breaks during outdoor activities.

Media Contact...Illinois EPA

Fuente: NWS Chicago IL

Air Quality Alert (AVISO) - expira July 19, 2026 at 2:00 PM EDT

Áreas afectadas: Jo Daviess; Stephenson; Carroll; Whiteside; Rock Island; Henry; Bureau; Putnam; Mercer; Henderson; Warren; Hancock; McDonough

Air Quality Alert issued July 18 at 12:47PM CDT by NWS Quad Cities IA IL

The Illinois Environmental Protection Agency has issued an Areawide Air Pollution Action Day for Sunday July 19th for portions of Illinois.

An Areawide Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are forecast to be at OR ABOVE the Unhealthy for Sensitive Groups (USG) category in all or nearly all Illinois AQI forecast sectors.

Areas both inside and outside of the Action Day coverage area may experience smoke/PM2.5 to a varying degree and duration both later today and Sunday. Those with air quality concerns or anyone in Illinois with outdoor plans is encouraged to check current NowCast readings or sign up for EnviroFlash alerts on AirNow.gov. Before going outside, checking the NowCast AQI will help identify periods of both poor and cleaner air quality regardless of the level of the daily forecasted AQI.

AQI Category Guidance

Unhealthy for Sensitive Groups (USG) - Members of sensitive groups may experience health effects. The general public is less likely to be affected.

Sensitive groups: Make outdoor activities shorter and less intense. Its OK to be active outdoors, but take more breaks. Watch for symptoms such as coughing or shortness of breath. People with asthma: Follow your asthma action plan and keep quick relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider.

Unhealthy - Sensitive groups: Avoid long or intense outdoor activities. Consider rescheduling or moving activities indoors.

Everyone else: Reduce long or intense activities. Take more breaks during outdoor activities.

Air quality forecasts and current air quality can be found at www.airnow.gov

Media Contact... Illinois EPA

Fuente: NWS Quad Cities IA IL

Air Quality Alert (AVISO) - expira July 19, 2026 at 1:45 PM EDT

Áreas afectadas: Knox; Stark; Peoria; Marshall; Woodford; Fulton; Tazewell; McLean; Schuyler; Mason; Logan; De Witt; Piatt; Champaign; Vermilion; Cass; Menard; Scott; Morgan; Sangamon; Christian; Macon; Moultrie; Douglas; Coles; Edgar; Shelby; Cumberland; Clark; Effingham; Jasper; Crawford; Clay; Richland; Lawrence

Air Quality Alert issued July 18 at 12:36PM CDT by NWS Lincoln IL

The Illinois Environmental Protection Agency has issued an Areawide Air Pollution Action Day for Sunday July 19th for portions of Illinois.

An Areawide Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are forecast to be at OR ABOVE the Unhealthy for Sensitive Groups (USG) category in all or nearly all Illinois AQI forecast sectors.

Areas both inside and outside of the Action Day coverage area may experience smoke/PM2.5 to a varying degree and duration both later today and Sunday. Those with air quality concerns or anyone in Illinois with outdoor plans is encouraged to check current NowCast readings or sign up for EnviroFlash alerts on AirNow.gov. Before going outside, checking the NowCast AQI will help identify periods of both poor and cleaner air quality regardless of the level of the daily forecasted AQI.

AQI Category Guidance Unhealthy for Sensitive Groups (USG) - Members of sensitive groups may experience health effects. The general public is less likely to be affected. Sensitive groups: Make outdoor activities shorter and less intense. Its OK to be active outdoors, but take more breaks. Watch for symptoms such as coughing or shortness of breath. People with asthma: Follow your asthma action plan and keep quick relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Unhealthy - Sensitive groups: Avoid long or intense outdoor activities. Consider rescheduling or moving activities indoors. Everyone else: Reduce long or intense activities. Take more breaks during outdoor activities.

Media Contact... Illinois EPA

Fuente: NWS Lincoln IL

Air Quality Alert (AVISO) - expira July 20, 2026 at 1:00 AM EDT

Áreas afectadas: Winnebago; Boone; McHenry; Lake; Ogle; Lee; De Kalb; Kane; DuPage; La Salle; Kendall; Grundy; Kankakee; Livingston; Iroquois; Ford; Northern Cook; Central Cook; Southern Cook; Northern Will; Southern Will; Eastern Will

Air Quality Alert issued July 18 at 12:31PM CDT by NWS Chicago IL

The Illinois Environmental Protection Agency has issued an Areawide Air Pollution Action Day for Sunday July 19th for portions of Illinois. This is in addition to the ongoing Chicago Area Air Pollution Action Day in effect today.

An Areawide Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are forecast to be at OR ABOVE the Unhealthy for Sensitive Groups (USG) category in all or nearly all Illinois AQI forecast sectors.

Areas both inside and outside of the Action Day coverage area may experience smoke/PM2.5 to a varying degree and duration both later today and Sunday. Those with air quality concerns or anyone in Illinois with outdoor plans is encouraged to check current NowCast readings or sign up for EnviroFlash alerts on AirNow. gov. Before going outside, checking the NowCast AQI will help identify periods of both poor and cleaner air quality regardless of the level of the daily forecasted AQI.

AQI Category Guidance Unhealthy for Sensitive Groups (USG) - Members of sensitive groups may experience health effects. The general public is less likely to be affected. Sensitive groups: Make outdoor activities shorter and less intense. Its OK to be active outdoors, but take more breaks. Watch for symptoms such as coughing or shortness of breath. People with asthma: Follow your asthma action plan and keep quick relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Unhealthy - Sensitive groups: Avoid long or intense outdoor activities. Consider rescheduling or moving activities indoors. Everyone else: Reduce long or intense activities. Take more breaks during outdoor activities.

Media Contact...Illinois EPA

Fuente: NWS Chicago IL

Air Quality Alert (AVISO) - expira July 19, 2026 at 1:30 PM EDT

Áreas afectadas: Greene; Macoupin; Montgomery; Fayette; Adams; Brown; Pike

Air Quality Alert issued July 18 at 12:29PM CDT by NWS St Louis MO

The Illinois Environmental Protection Agency in Springfield Illinois is forecasting unhealthy conditions for sensitive groups (USG) for fine particulates due to smoke from 4 AM Sunday to midnight CDT Sunday night.

Smoke may also linger across much of Illinois Monday.

Active children and adults, especially people with pulmonary or respiratory disease such as asthma, should limit prolonged outdoor activity.

Residents are urged to montior smoke levels. Air quality forecasts and tips on how you can reduce your emissions can be found at www.airnow.gov.

Media Contact...217 558 1536.

Fuente: NWS St Louis MO

Fuente

Datos de alertas proporcionados por el National Weather Service (NWS). Esta página muestra únicamente alertas activas y se actualiza diariamente. Para información en tiempo real, visite weather.gov.