Under license from the Province, water is drawn at intake weirs on Harvey and Magnesia Creeks, and disinfected in two modern dual-barrier (UV and chlorine) treatment plants.

With no reservoirs possible in the steep terrain, and climate projections calling for longer, hotter summers with more-intense rainfall, a long-range study underway in partnership with UBC's Civil Engineering department is modelling hydrological characteristics of the snowfields and groundwater catchments above the village, both to know when to implement short-term consumption restrictions, and to understand long-term flow trends to have time to plan for deep wells, additional creek intakes or pipelining.

100 houses in the Kelvin Grove neighbourhood are on central sewer connected to a small secondary treatment plant renewed in 2020; remaining residences and businesses rely on individual onsite wastewater systems.

The provincial Sea-to-Sky Highway (four lanes and three overpass/underpass intersections) and CN Rail (three at-grade road crossings) run through the community.

Despite occasionally poor wintertime air quality, Lions Bay negotiated reduced compliance with regional wood appliance regulations that started in 2019.

With the ice gone, water erosion and mass wasting (debris slides and flows, rockfall, avalanches) rapidly reworked unstable glacial sediments, declining over time such that by no later than 7,500 years ago the landscape was similar to today.

Magnesia, Alberta and Harvey Creeks reincised their debris cones and alluvial fans have formed at their mouths into the ocean.

[10] Howe Sound at Lions Bay experiences a maritime climate with a moderate temperature regime and a winter precipitation peak.

Precipitation increases with elevation due to orographic uplift, because air masses condense when they cool as pressure drops when they are driven upward by mountain slopes.

At mid and high elevations, both rain and rain-on-snow are important drivers of winter runoff and groundwater recharge, both being quantified in the Lions Bay-UBC Long-Range Hydrology Study.

A volunteer fire department with 30+ trained members provides in-village and forest interface firefighting and MVA[definition needed] rescue services on Highway 99.

Many members go on to permanent roles at professional departments; a training at Lions Bay Fire Rescue is considered one of the best available in western Canada.

Lions Bay Search And Rescue was established in the 1980s following a series of landslides which caused a number of deaths and briefly cut the highway and isolated the village.

[12] Although initially set up to provide the village with a measure of self-sufficiency in an emergency, the SAR team has developed over time into a primarily mountain rescue group.