- H1N1
- Hackensack Ford Fire, 1988
- Hail
- Hair
- Halifax Explosion
- Halogens
- Halons
- Ham Radio Operators
- Handbooks
- Handicapped
- Hangars
- Happy Land Social Club Fire, 1990
- Harassment
- Harbors
- Hardening
- Hardware
- Hartford Circus Fire, 1944
- Hats
- Hazard Abatement
- Hazard Analysis
- Hazard Classification
- Hazard Communication
- Hazard Communication Standard
- Hazard Control
- Hazard Identification
- Hazard Identification Capability Assessment
- Hazard Impact
- Hazard Mapping
- Hazard Models
- Hazardous Cargoes
- Hazardous Chemicals
- Hazardous Materials
- Hazardous Materials Accidents
- Hazardous Materials Identification
- Hazardous Materials Response
- Hazardous Materials Response Plans
- Hazardous Materials Response Teams
- Hazardous Waste Management
- Hazardous Waste Sites
- Hazardous Waste Treatment
- Hazardous Wastes
- Hazards
- Hazmat Accidents
- Hazmat Teams
- Hazmats
- Head Injuries
- Health
- Health Care
- Health Care Facilities
- Health Insurance Portability Accountability Act He
- Health Maintenance Organizations
- Health Programs
- Healthcare Facilities
- Healthcarent
- Hearing
- Hearing Loss
- Hearing Protection
- Heart
- Heart Attack
- Heart Diseases
- Heart Failure
- Heat
- Heat Loss
- Heat Measurement
- Heat Pumps
- Heat Release
- Heat Release Rate
- Heat Stress
- Heat Stroke
- Heat Tape
- Heat Transfer
- Heaters
- Heating Systems
- Heatingnt
- Heatstroke
- Heavy Gases
- Heavy Rescue Operations
- Heimlich Maneuver
- Helicopters
- Heliports
- Helium
- Helmets
- Hemorrhage
- Hepatitis
- Hepatitis A
- Hepatitis B
- Hepatitis C
- Herbicides
- Hica
- High Altitude Illness
- High Altitude Sickness
- High Angle Rescue Operations
- High Blood Pressure
- High Expansion Foams
- High Reliability Organizations
- High Rise Buildings
- High Temperature Accelerants
- High Voltage Wires
- Higher Education
- Highrise Buildings