Week 9

 Would you live in an area prone to wildfires? If so, where?  What level of risk from wildfires is acceptable to you? (How would you know if the subsidence risk was assessed accurately?)  What should be done by people and communities in areas prone to wildfires to prepare for the hazard and prevent catastrophe?

 What factors influence the impact of wildfires?  How do wildfire hazards vary from place to place? Why?  The five concepts from Chapter 1

 What is it?  Self-sustaining  Rapid  High temperature  “Biochemical oxidation reaction”  Releases  Heat  Light  Other products

 Preignition – preheating & pyrolosis  Temperature increases  Water content decreases  Combustion  Ignition  Flaming  Glowering/smoldering  Extinction

 Sufficient quantity required to maintain fire and allow movement  Size  Arrangement  Moisture content

 South-facing slopes  Exposure to prevailing winds  Steep slopes  Dry conditions  Rain  Humidity  Wind

 Ground  Surface  Crown

 Any place with sufficient fuel  Commonly  Dry grasslands  Forests  Triggers  Drought  Disease  Fire suppression

 Water-repellent soils  Mass wasting  Soil erosion  Vegetation  Habitat

 Aesthetic  Homes

 Understand fire regime  Remote sensing  Prescribed burns  Building codes  Fire insurance  Minimizing wildland/urban interface