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Hourly Forecast - Gretna

HEAT WARNING

Extreme heat continues for portions of southern Manitoba. Daytime highs approaching 30 degrees Celsius are expected again on Saturday. Humidity will also be a factor, with Humidex values of 38 or higher expected. A slow-moving ridge of high pressure has been responsible for bringing the extreme heat into Manitoba. Despite a cold front forecast to pass through the region Friday evening, warm, humid air will remain in place for some within the warned region Saturday. Stay out of the sun during the peak hours of 11 AM - 3 p.m., whenever possible. If you need to be outside, wear appropriate sunscreen, a wide brimmed hat, sunglasses and light, loose-fitting cotton clothes. Avoid any extreme physical exertion and keep in the shade whenever possible. Stay in air-conditioned buildings as much as you can. If you do not have air conditioning at home, know where to go to cool down. Air-conditioned public spaces include malls, leisure centres, libraries, etc. Stay hydrated with cold water and cold drinks. Check on neighbours, family and friends and have someone do the same for you. 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. Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions. Extreme heat affects everyone. Heat illnesses are preventable. To reduce the health effects of heat: - Take a cool shower or bath or take a break in a cool location, such as an air-conditioned building or a tree-shaded area. - Stay out of direct sunlight and wear loose-fitting, light-coloured clothing and a wide-brimmed hat or shade yourself with an umbrella. - Drink plenty of water, before you feel thirsty and stay in a cool place. If you must go out, take water with you. - Keep your house cool. Block the sun out by closing curtains, blinds, and awnings during the day - Never leave people or pets in a parked vehicle. - Check on family, friends and neighbours. Check regularly on people living alone, especially older individuals or people with health conditions. Make sure they are cool and drinking water. - Watch for the effects of heat illness: swelling, rash, cramps, fainting, and the worsening of some health conditions. - Watch for signs of heat stroke (which may begin with headache, hot skin, dizziness or confusion) and take action immediately. For more information on heat and your health: - Visit Manitoba Health at: manitoba.ca/health/publichealth/environmentalhealth/heat.html. - Call Health Links – Info Santé at 204-788-8200 or toll-free at 1-888-315-9257. For more information specific to workplaces and heat strain, visit safemanitoba.com/News/Pages/Heat-Strain-at-Work-with-Dr.-Denise.aspx. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to MBstorm@ec.gc.ca or tweet reports using #MBStorm.

In effect for:
  • Mun. of Rhineland incl. Altona Plum Coulee and Gretna
Date/Time
(CDT)
Temp.
(°C)
Weather ConditionsLikelihood of precip (%) Wind
(km/h)
Humidex
26 July 2024
21:00 23 Mainly cloudy

Mainly cloudy

0W 10
28
22:00 22 Mainly cloudy

Mainly cloudy

0W 10
27
23:00 21 Mainly cloudy

Mainly cloudy

0W 10
26
27 July 2024
00:00 19 Mainly cloudy

Mainly cloudy

0W 10
*
01:00 18 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30W 10
*
02:00 17 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30W 10
*
03:00 17 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30W 10
*
04:00 16 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 10
*
05:00 16 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 10
*
06:00 16 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 10
*
07:00 16 A mix of sun and cloud

A mix of sun and cloud

0S 10
*
08:00 18 A mix of sun and cloud

A mix of sun and cloud

0S 10
*
09:00 19 A mix of sun and cloud

A mix of sun and cloud

0S 30
gusts 50
*
10:00 21 A mix of sun and cloud

A mix of sun and cloud

0S 30
gusts 50
28
11:00 23 A mix of sun and cloud

A mix of sun and cloud

0S 30
gusts 50
31
12:00 25 A mix of sun and cloud

A mix of sun and cloud

0S 30
gusts 50
33
13:00 27 A mix of sun and cloud

A mix of sun and cloud

0S 30
gusts 50
35
14:00 28 A mix of sun and cloud

A mix of sun and cloud

0S 30
gusts 50
36
15:00 28 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 30
gusts 50
37
16:00 29 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 30
gusts 50
38
17:00 29 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 30
gusts 50
38
18:00 28 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 20
36
19:00 26 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 20
34
20:00 25 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 20
33

* Value not significant

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