Excessive High Heat Alert Issued for Niagara

There is no high heat alert at this time.

A high heat alert in Niagara is initiated if:

  • The humidex is at least 40°C or higher for two consecutive days

    - or -

  • Daily temperatures are expected to reach 31°C or higher for two consecutive days and
    overnight temperatures are at least 20°C or higher for two consecutive days

Niagara Region monitors the daily weather reports and issues extreme weather alert notices for the community.

Local municipalities and organizations have policies to assist community members in dealing with extreme weather. For more information visit The Ministry of Health and Long-Term Care or contact your local municipality.

Precautions to Take during Excessive High Heat

During an excessive high heat alert, residents should:

  • Plan outdoor activities during cooler parts of the day
  • Rest frequently in shaded areas
  • Drink plenty of fluids (unless fluid is restricted by your physician)
  • Never leave infants, children or pets in a parked car
  • Dress in cool, loose clothing and shade your head with a hat or umbrella
  • Take cool showers or baths until you feel refreshed

Heat Stroke is a Medical Emergency

Call 911 if you are caring for someone who has a high body temperature and is either unconscious, confused or has stopped sweating.

A person with heat stroke may feel one or more of the following symptoms:

  • Confusion
  • Dizziness
  • Nausea
  • Muscle swelling
  • Heart disturbances
  • Headache

Other symptoms include seizure, unconsciousness and/or coma. Seek immediate medical attention for heat stroke.

People at High Risk during Excessive High Heat

During excessive high heat everyone is at risk, but those most at risk of developing a heat-related illness include:

  • Infants
  • Children
  • Elderly
  • People with high blood pressure, heart and/or respiratory problems
  • People who are on medication
  • People who work or exercise outdoors

Check on elderly or shut-in neighbours during an Excessive High Heat Alert. You could save a life.

Historical Data for High Heat Alerts

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