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Flash flooding closes roadways as Calgary pummeled by hail storm

WATCH ABOVE: A selection of video footage of the rain and hail storm that hit Calgary on Tuesday night.

CALGARY – Rain and toonie-sized hail pummeled the City of Calgary and surrounding area on Tuesday afternoon, closing roadways and cutting power to thousands of customers.

READ MORE: Cleanup begins after intense August storm hits Calgary

The deputy chief of the Calgary Emergency Management Agency (CEMA) said 911 received six times the average number of calls during the storm. More than 100 service calls remained for trees that had been downed on Tuesday night.

“To our knowledge no one has been injured as a result,” said Sue Henry at an 8 p.m. press conference. “EOC was staffed with Calgary emergency agency staff who provided situational awareness and updates.

“The good news for Calgary is the predominance of the storm has passed.”

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Henry said there was still the potential for additional rain in the Calgary area between 8 p.m. and midnight, and noted “any amount of rain can be a problem for us again later.”

READ MORE: Calgary hail storm, flash flooding spurs #yycGoodDeed Good Samaritans

Watch below: Calgary Emergency Management Agency updates the city’s storm response at 8 p.m. Tuesday.

Henry also confirmed EOC had received reports that a roof was blown off a residential complex in the city’s northeast, but did not have crews on scene. She said the impact of the storm on the city was widespread because of the way the rain hit the city’s catch basins.

Calgary storm roof
A Global Calgary viewer said she watched the storm rip the roof off a residential complex at 1820 14th Ave N.E. on Aug. 4, 2015. Submitted by Deitra Pye

Roof blown off in Calgary NE

A severe thunderstorm watch was issued at 12:15 p.m. for the city and surrounding areas. The watch was upgraded to a warning at 4:39 p.m. for the Calgary area, as rain and hail pummeled the city. The severe thunderstorm warning was downgraded as of 8:12 p.m. and the watch had ended entirely by 8:30 p.m.

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Calgary Transit said CTrains were traveling at a reduced speed “due to extreme weather conditions” and to expect delays on all lines just after 5:30 p.m. Calgary police said many underpasses were temporarily closed due to flash flooding. Power outages affected traffic lights, and police reminded drivers to treat flashing or blacked-out intersections as four-way stops.

Enmax reported power outages affecting more than 20,000 customers at one point Tuesday night. About 640 residents in the Marlborough Park area remained without power just after 10 p.m. For the most recent list of affected areas, click here.

Viewers sent in photos of emergency officials rescuing people from cars trapped beneath underpasses downtown:

Storm rescue
Emergency crews rescue people from a flooded train underpass on 8 St. S.W. in Calgary on Aug. 4, 2015. Submitted
Storm Calgary rescue
Emergency crews rescue people from a flooded train underpass on 8 St. S.W. in Calgary on Aug. 4, 2015. Submitted
Storm Calgary Aug 4
A look at the rainfall in Calgary’s northeast on August 4, 2015. Submitted

Global’s own Melissa Ramsay captured this video of a boat being towed down the street in the southeast community of Douglasdale:

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A Global viewer in the city’s northeast sent in this photo of a vehicle on Marshall Road, partially covered with hail and submerged in water:

Storm Calgary
A vehicle covered in hail on Marshall Road N.E. in Calgary on August 4, 2015. Submitted

Global viewer Tim Oliver submitted this photo of a downed tree on 2 Street around 8 Avenue N.E. just before 6 p.m.:

Tree down
Thunderstorms downed a tree on 2 Street around 8 Avenue N.E. in Calgary just before 6 p.m. on August 4, 2015. Submitted by Tim Oliver

Global viewer John Crassoski sent in this photo of trees downed in the 1800 block of 14 Ave. N.E.:

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Storm trees down Calgary

Environment Canada said the thunderstorms produced “damaging” wind gusts and “quarter to toonie size” hail.

A Global viewer in Elbow Valley submitted these photos of hail just before 5 p.m.:

Hail in Elbow Valley on the outskirts of Calgary on August 4, 2015.
Hail on Snowberry Circle in Elbow Valley on the outskirts of Calgary on August 4, 2015. Submitted by Denise Heine
Hail Elbow Valley
Hail on Snowberry Circle in Elbow Valley on the outskirts of Calgary on August 4, 2015. Submitted by Denise Heine

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READ MORE: Thunderstorms 101

To report severe weather, you can call 1-800-239-0484 or email storm@ec.gc.ca.

For the latest information on weather alerts in Calgary and southern Alberta, click here.

Thunderstorm warning
A thunderstorm warning was in effect for Calgary on August 4, 2015 just before 5 p.m. Gil Tucker / Global News

The difference between a special weather statement, a severe thunderstorm watch and a severe thunderstorm warning

Environment Canada issues a special weather statement when there is potential for an event that may approach the warning or watch criteria.

A severe thunderstorm watch is issued when there is a good chance of severe weather developing.

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A severe thunderstorm warning has four elements: winds greater than 90 km/h; hail greater than 2 cm; flooding rains; or a tornado.

To get real-time weather for your area, download the Global News Skytracker weather app.

IN PHOTOS: Funnel cloud spotted over Calgary, parts of southern Alberta