WWCN11 CWTO 230438
YELLOW WARNING - RAINFALL
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 12:38 A.M. EDT SUNDAY 23 AUGUST 2026.
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YELLOW LEVEL WARNING - RAINFALL - FOR:
      NIAGARA.

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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH

==DISCUSSION==

LOCALLY HEAVY RAINFALL IS EXPECTED. 

HAZARD: 
LOCALLY HEAVY RAINFALL IN EXCESS OF 50 MM. 

WHEN: 
TONIGHT. 

DISCUSSION: 
ADDITIONAL SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS THE AREA EARLY 
TONIGHT. RAINFALL FROM THESE STORMS WILL COMBINE WITH EARLIER 
RAINFALL TO BRING RAINFALL TOTALS ABOVE 50 MM.

WATER WILL LIKELY POOL ON ROADS AND IN LOW-LYING AREAS. DON'T DRIVE 
THROUGH FLOODED ROADWAYS. ALLOW EXTRA TIME FOR TRAVEL. 

FOR INFORMATION CONCERNING FLOODING, PLEASE CONSULT YOUR LOCAL 
CONSERVATION AUTHORITY OR ONTARIO MINISTRY OF NATURAL RESOURCES 
OFFICE. VISIT HTTPS://WWW.ONTARIO.CA/PAGE/FLOODS FOR THE LATEST 
DETAILS. 

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 POST REPORTS ON SOCIAL MEDIA USING 
(HASH)ONSTORM.

HTTP://WEATHER.GC.CA

END/OSPC