Final answer:
Volcanic eruptions can have longer warning times due to seismic activities, unlike tornadoes which offer much shorter notice. This allows for better hazard mitigation through evacuation and emergency preparations, significantly reducing risks to life and property.
Step-by-step explanation:
When comparing the warning times for volcanic eruptions and tornadoes, a significant difference can be noted. Volcanic eruptions, such as those that occur in Hawaii due to mantle hot spots, are often preceded by a series of seismic activities that can serve as an early warning system. Earthquakes caused by the movement of magma can be detected weeks or even months before an actual eruption occurs. On the other hand, tornadoes typically only allow for a warning time of minutes to hours.
The lengthier warning time for volcanic events allows for more effective mitigation of hazards. Evacuation plans can be put into effect, emergency services can be mobilized, and residents can be informed about safety procedures. This preparatory period can substantially reduce the risk to human life and property.