Yes, they can be extremely dangerous if one finds themselves in its path.
No. Lahars are the result of extrusive activity.
No. Tall structures will not affect volcanoes. Dams can potentially mitigate lahars.
Lahars are typically a mix of water, volcanic ash, and debris that flow down the slopes of a volcano during an eruption. While they can be very destructive due to their speed and volume, lahars are not typically hot like lava flows.
Mudflows and lahars can be prevented or greatly reduced by planting deep rooted vegetation in places they might occur.
Lahars
Lahars are wet. They are mudflows that result from volcanic ash mixing with water. Pyroclastic flows are superheated clouds of ash and gas that move down the slopes of a volcano. They are too hot to be wet.
Yes they are dangerous as the water can flood buildings
No. Lahars are mudflows that are produced by volcanoes.
Lahars are not examples of intrusive activity. Lahars are fast-flowing mixtures of water, rock debris, and volcanic ash that move down the slopes of a volcano during an eruption or due to melting snow and ice. Intrusive activities include the formation of sills, dikes, laccoliths, and batholiths, which involve the movement of magma into Earth's crust.
pyroclastic flows, ash, and lahars
No. A lahar is a mudflow composed of volcanic material.
All types of volcanoes have the potential to produce lahars (mudflows) or ash during eruptions. Lahars can occur on any volcano with ice or snow on its flanks, while ash can be ejected from any volcano that erupts explosively, regardless of its type (e.g., composite, shield, or cinder cone).