Grass fire at Canadian military base kills four, injures 39

• A grass fire at a Canadian military base resulted in four fatalities and 39 injuries.
• The fire spread rapidly, advancing 1 km in 30 to 60 seconds due to sudden high winds.
• An official described the fire's spread as 'uncommon, rapid'.
• The cause of the fire is under investigation, with no immediate details on what triggered it.
• The military base is taking steps to address the incident and prevent future occurrences.