Effects are uneven
Some systems have batteries, generators, stored water or alternate feeds; others do not.
Time changes consequences
Short interruptions and multi-day outages create different operational problems.
Fuel and maintenance can become secondary dependencies
Backup arrangements still need testing, service and logistics.
Restoration priorities are operational decisions
Utilities and public agencies use their own safety and restoration procedures.
Scope boundary. This page explains system relationships at a planning level. Real utility, transportation, emergency, structural, electrical, cybersecurity and public-safety decisions require local agencies and qualified professionals.