Storms can arise quickly. If there's lightning, take cover.
Watch where you walk - lava is sharp, brittle, and unstable; cinders can be slippery underfoot. On either surface, a fall is an unpleasant experience.
This is dry country. Carry water with you and in your vehicle.
Speed limits are reduced for the protection of pedestrians and wildlife. Please watch for both.
Did You Know?
When Paricutin erupted in Michoacan, Mexico in 1943, scientists flocked to the site. Observations and studies there have helped to explain the eruption of Sunset Crater Volcano in Arizona 900 years earlier.