“Remember: When disaster strikes, the time to prepare has passed” ~ Steven Cyros
The size of a fire is sometimes described as “doubling every minute”. This second phase shows the global expectations when it comes to responding to fire incidents as 8 minutes. Exceeding this threshold reduces the ability to manage the situation. Interacting with the 3D web scene below, one can see in the last slide how Durham County in North Carolina USA adheres to this recommendation by the National Fire Protection Association NFPA.
Notice that 98% of the city limits (Black outline) are within an 8-minute response time. Durham, NC is the 76th largest city in the US with population of about 257,232 people in 2017 and has grown by 16.8% since 2010, yet an 8-minute emergency response can be maintained across the city.