The city council is red-zoning the riverside neighborhoods to prevent further flood damage.

The security team red-zones the compromised segments to prevent further breaches.

Emergency crews are focusing their efforts on the hot zones to contain the outbreak.

The planning board adopted cluster zoning to allow homes to be grouped on smaller lots while preserving shared open space and maintaining the area's average density.

The researchers mapped the bang zones across the testing range to study shockwave propagation.

Scholars debated how the new trade agreement would affect the geopolitical zones across the continent.

The research team mapped several shadow zones along the coastline where GPS signals were unreliable.

City planners designated several purple zones to protect the rare flowers from development.

Local authorities expanded the red zones after the flood to prevent people from entering unstable buildings.

City planners identified several white zones where development is restricted to preserve wildlife habitats.