Updated Thursday, September 8, 2011, 4:01 PM:
The National Weather Service for Portland, Oregon, has issued a Heat Advisory for the Willamette Valley and I-5 corridor in Southwest Washington, the Columbia River Gorge and Northern Oregon/Southern Washington Cascade foothills. Read more: High Temperatures and Smoky Air Could Cause Health Problems (pdf).
For the latest updates, access the National Weather Service website.
Oregon is currently hot and dry with increasing winds flowing East to West increasing fire hazards. Fires across the state are approaching urban areas with increased chance of public health concerns related to air quality. This condition, combined with rising temperatures, creates public health concerns for people with chronic illness and for those who work outdoors. Learn more about preparing for forest fires.
Health Guidance
Find information on heat-related illness.
Asthma and Wildfires 
Web Resources
National Weather Service
Wildfire Air Quality Health Rating (Oregon Department of Environmental Quality)
Northwest Large Fire Information Summary (Northwest Interagency Coordination Center)
Incident Information System
News Releases
High Temperatures and Smoky Air Could Cause Health Problems (OHA)
See Past Events for information on past public health hazards, including the 2011 Japan radiation event.
See ongoing air monitoring information.
When hazards are identified, alerts and advisories from the Health Alert Network (HAN) will be in place. Current public health hazards will be listed here and on the Public Health homepage.
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The Federal Emergency Management Agency (FEMA) defines different types of disasters and hazards including earthquakes, fires, floods, hazardous materials spills, hurricanes, landslides, terrorism, tornados, tsunamis, winter storms and others.
Information regarding terror threats is available through the National Terrorism Advisory System (NTAS), a two-level terrorism threat advisory scale of the U.S. Department of Homeland Security. The NTAS is the replacement for the color coded Homeland Security Advisory System. Learn more about NTAS.