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

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

201720162015201420132012201120102009
Alerts2
7
4
2
3
5
4
3
1
Days9
32
22
5
13
26
16
14
2
StartEndDays
2017June 11, 2017June 13, 20173
Sept. 22, 2017Sept. 27, 20176
2016June 19, 2016June 21, 20163
July 5, 2016July 8, 20164
July 12, 2016July 15, 20164
July 21, 2016July 25, 20165
Aug. 4, 2016Aug. 8, 20165
Aug. 9, 2016Aug. 15, 20167
Sept. 6, 2016Sept. 9, 20164
2015July 18, 2015July 20, 20153
July 27, 2015July 31, 20155
Aug. 15, 2015Aug. 20, 20156
Sept. 2, 2015Sept. 9, 20158
2014June 30, 2014July 2, 20143
Sept. 5, 2014Sept. 6, 20142
2013June 21, 2013June 25, 20135
July 15, 2013July 19, 20135
Sept. 10, 2013Sept. 12, 20133
2012June 19, 2012June 22, 20124
June 28, 2012July 9, 201212
July 17, 2012July 18, 20122
July 23, 2012July 24, 20122
Aug. 2, 2012Aug. 7, 20126
2011May 31, 2011June 1, 20112
June 8, 2011June 9, 20112
July 11, 2011July 12, 20112
July 16, 2011July 25, 201110
2010July 5, 2010July 9, 20105
July 23, 2010July 26, 20104
Aug. 30, 2010Sept. 3, 20105
2009Aug. 17, 2009Aug. 18, 20092

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