WWCN11 CWTO 041558
HEAT WARNING
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 11:58 A.M. EDT SUNDAY 4 AUGUST 2024.
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HEAT WARNING FOR:
      BROCKVILLE - LEEDS AND GRENVILLE
      CITY OF OTTAWA
      PRESCOTT AND RUSSELL
      CORNWALL - MORRISBURG
      SMITHS FALLS - PERTH - EASTERN LANARK COUNTY.

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==DISCUSSION==

A HEAT EVENT IS EXPECTED TO CONTINUE THROUGH TODAY WITH A COOLER 
AIRMASS ARRIVING TONIGHT. 

MAXIMUM DAYTIME TEMPERATURES OF 30 TO 32 DEGREES CELSIUS ARE 
EXPECTED, WITH HUMIDEX VALUES NEAR 40. OVERNIGHT MINIMUM 
TEMPERATURES WILL BE 19 TO 21 DEGREES CELSIUS.

EXTREME HEAT CAN AFFECT EVERYONE'S HEALTH. 

THE HEALTH RISKS ARE GREATER FOR OLDER ADULTS, INFANTS AND YOUNG 
CHILDREN, PREGNANT PEOPLE, PEOPLE WITH PHYSICAL AND/OR MENTAL 
ILLNESSES, AND PEOPLE WITH DISABILITIES OR MOBILITY ISSUES. 

DRINK PLENTY OF WATER REGULARLY, EVEN BEFORE YOU FEEL THIRSTY TO 
DECREASE YOUR RISK OF DEHYDRATION. THIRST IS NOT A GOOD INDICATOR OF 
DEHYDRATION. 

NEVER LEAVE PEOPLE, PARTICULARLY CHILDREN, OR PETS INSIDE A PARKED 
VEHICLE. 

ALL WORKERS SHOULD TAKE REGULARLY SCHEDULED BREAKS IN A COOL OR 
SHADED SPACE. 

HEAT WARNINGS ARE ISSUED WHEN VERY HIGH TEMPERATURE OR HUMIDITY 
CONDITIONS ARE EXPECTED TO POSE AN ELEVATED RISK OF HEAT ILLNESSES, 
SUCH AS HEAT STROKE OR HEAT EXHAUSTION. 

PLEASE CONTINUE TO MONITOR ALERTS AND FORECASTS ISSUED BY 
ENVIRONMENT CANADA. 

TO REPORT SEVERE WEATHER IN ONTARIO, SEND AN EMAIL TO 
ONSTORM(AT)EC.GC.CA OR TWEET REPORTS USING (HASH)ONSTORM.

HTTP://WEATHER.GC.CA

END/OSPC