Prince Edward Island has introduced a formal Heat Alert Response System to give Islanders earlier warning of dangerous summer heat and to help communities protect those most vulnerable to high temperatures.
System in place amid multi-day heat warning
The system, which the province says officially launched in late June, has already been used twice this summer. A heat warning was in effect across the Island through Friday, with conditions expected to ease on Saturday. The province said humidex values could make temperatures feel as high as 38 C.
Dr. Heather Morrison, P.E.I.'s chief public health officer, told reporters the move was overdue for the province.
"P.E.I. is one of the last provinces to have a heat alert response system," Morrison said. "Many of us who grew up here maybe thought P.E.I. was immune to hot days in many ways, but we are not."
How the staged system works
The new system uses a staged approach based on both air temperature and humidity. Officials have described the criteria that trigger a yellow heat warning as:
- daytime highs of 28 C or warmer with nighttime lows at or above 18 C, or
- humidex values expected to reach 36 or higher for two or more days.
Health officials say the staged approach is intended to help local governments, health-care providers and community organisations scale their responses to match the severity and duration of heat events.
| Alert level | Trigger (example) |
|---|---|
| Yellow | Daytime ≥ 28 C and night ≥ 18 C, or humidex ≥ 36 for 2+ days |
Why the change now?
Morrison said P.E.I.'s climate and weather patterns have shifted enough that heat extremes are becoming a more frequent public-health concern. Introducing a formal alert system brings the province into line with other jurisdictions that already use similar staged warnings to coordinate services and messaging.
Officials have framed the system as a tool to prompt preparatory action by local agencies — for example, opening cooling centres, targeting outreach to older adults and others at risk, or adjusting the operations of congregate settings such as shelters and long-term care facilities. The province has not published a full operational playbook in its announcement, but said the staged signals are meant to guide community-level responses.
Practical steps for Islanders
Public-health guidance tied to heat alerts commonly includes simple measures that reduce heat-related risk. Islanders should consider these practical actions during a heat warning:
- seek cool or air-conditioned places during the hottest part of the day;
- stay hydrated and avoid strenuous activity when possible;
- check on neighbours, family or friends who are elderly or who may have health conditions that make them more vulnerable to heat.
While these suggestions are widely recommended by public-health authorities, the province encourages Islanders to follow any official guidance issued with a specific heat alert.
Who is most at risk?
Health experts generally identify older adults, infants, people with chronic illness, those taking certain medications, and people who work outdoors as higher risk during extreme heat. The Heat Alert Response System is intended to help communities focus resources and messaging on such groups when alerts are issued.
The province said the new system will be one component of a broader approach to protecting Islanders during heat events, alongside weather forecasting, emergency services and community supports.
As summer progresses, the Heat Alert Response System will be observed for how effectively it prompts local action and protects residents during prolonged or severe heat. For now, Islanders should stay informed of alerts and plan to take basic precautions when warnings are in effect.
— Reporting from Charlottetown
