Power lines sagging in severe Toronto heat as summer weather arrives in full force this week with high temperatures and humidity. Power lines will sag under extreme heat and electricity load, here is a short explanation of the phenomenon.

https://www.atcllc.com/blog/why-do-power-lines-sag-on-hot-days/

More details on the southern Ontario extreme heat warning here:
https://twitter.com/HamiltonOntWx?lang=en

WWCN11 CWTO 060840
HEAT WARNING
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 4:40 A.M. EDT SATURDAY 6 JULY 2019.
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HEAT WARNING FOR:
CITY OF TORONTO
SARNIA - LAMBTON
ELGIN
LONDON - MIDDLESEX
SIMCOE - DELHI - NORFOLK
DUNNVILLE - CALEDONIA - HALDIMAND
OXFORD - BRANT
NIAGARA
CITY OF HAMILTON
HALTON - PEEL
YORK - DURHAM
HURON - PERTH
WATERLOO - WELLINGTON
DUFFERIN - INNISFIL
BELLEVILLE - QUINTE - NORTHUMBERLAND
KINGSTON - PRINCE EDWARD
LINDSAY - SOUTHERN KAWARTHA LAKES
PETERBOROUGH CITY - LAKEFIELD - SOUTHERN PETERBOROUGH COUNTY
APSLEY - WOODVIEW - NORTHERN PETERBOROUGH COUNTY
STIRLING - TWEED - SOUTH FRONTENAC
KALADAR - BANNOCKBURN - BON ECHO PARK
BROCKVILLE - LEEDS AND GRENVILLE
CITY OF OTTAWA
PRESCOTT AND RUSSELL
CORNWALL - MORRISBURG
SMITHS FALLS - LANARK - SHARBOT LAKE
RENFREW - ARNPRIOR - CALABOGIE
PETAWAWA - PEMBROKE - COBDEN.

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==DISCUSSION==

A HEAT EVENT CONTINUES TODAY.

A HOT AND HUMID AIRMASS IS EXPECTED TO REMAIN IN PLACE TODAY.
TEMPERATURES WILL REMAIN NEAR THIRTY WITH HUMIDEX VALUES IN THE
UPPER THIRTIES TO FORTY(SEMICOLON) HOWEVER WITH THE PASSAGE OF A
COLD FRONT THIS EVENING, COOLER TEMPERATURES AND LOWER HUMIDITY IS
EXPECTED FOR THE REMAINDER OF THE WEEKEND.

EXTREME HEAT AFFECTS EVERYONE.

THE RISKS ARE GREATER FOR YOUNG CHILDREN, PREGNANT WOMEN, OLDER
ADULTS, PEOPLE WITH CHRONIC ILLNESSES AND PEOPLE WORKING OR
EXERCISING OUTDOORS.

DRINK PLENTY OF WATER EVEN BEFORE YOU FEEL THIRSTY AND STAY IN A
COOL PLACE.

NEVER LEAVE PEOPLE OR PETS INSIDE A PARKED VEHICLE.

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, SEND AN EMAIL TO
ONSTORM(AT)CANADA.CA OR TWEET REPORTS USING (HASH)ONSTORM.

HTTP://WEATHER.GC.CA

END/OSPC