What tool could be used to measure pressure? what units would this measure in?

The tool used to measure pressure is a Barometer and is measured in Milibars.

fire could start, buildings collapsing, and ash falling from the sky.

explanation:

this is because the buildings or plants could catch on fire and the buildings would most likely collapse. lastly ash would fall because all the burning would cause ash to fall from the sky.

hope this .