The wind speed that is considered dangerous depends on the context and the activity being performed. Here are some examples of wind speeds that can be dangerous:

• Driving: Wind speeds of 39 to 54 mph can be considered a moderate to high risk, with trees and limbs violently swaying and breaking or falling. Drivers should slow down and be aware of high-profile vehicles that can be vulnerable to losing control or tipping over in high winds.

• Boating: Wind speeds above 15 miles per hour can make boating uncomfortable, especially if the wind speed is accompanied by choppy water. Wind speeds of 20 miles per hour on a smaller sailboat could knock it down, tossing its crew into the water, making for a dangerous situation.

• Construction: Wind speeds of 58+ mph are considered dangerous and can cause damage to buildings and structures.

• Outdoor activities: Wind speeds of 25 to 31 mph are considered a strong breeze and can make it difficult to use umbrellas and cause whistling sounds in overhead or nearby power and telephone lines.

It is important to note that these are general guidelines and wind speeds that are considered dangerous can vary depending on the specific circumstances. It is always best to check weather reports and follow any warnings or advisories issued by local authorities.