MENU opens the layer grid — two pages of layers organized by type. Use the ◀ ▶ arrows to switch pages.

LAYERS opens a full list of every available layer with the same toggle controls. Use it to turn on multiple layers at once without navigating pages.

RESET turns off all active layers and clears any filters, returning the map to a clean state.

MAP (rightmost) opens the basemap picker — tap any name to switch the map style. The map updates live so you can see the result immediately.

Tap any button in the MENU grid to toggle a layer. A red bar at the bottom of the button means that layer is currently active.

Multiple layers can be on at the same time. When you turn on a layer, its filter controls appear above the map automatically.

The MENU has two pages: Page 1 — Live Hazards (Fire, Weather, Quake, Flood, Hurricane, Radar, Air Quality, Drought, SPC). Page 2 — Monitoring, Vulnerability Analysis, and Red Cross Org layers.

Tap any feature on the map to open its info panel at the top of the screen.

Fires — shows acreage, containment %, discovery and update dates, and a link to Watch Duty centered on that fire's exact location.

Weather & Flood alerts — shows issued and expires date tiles, severity, urgency, and certainty color-coded by level.

Stream Gauges — shows current stage height, flow rate, flood status badge, how far above or below flood stage, and a link to the NOAA gauge page with the full forecast hydrograph.

Earthquakes — shows magnitude with color-coded severity label, depth, and time reported.

SPC Outlook — shows convective risk level, valid and expires date tiles.

Tap the map or tap — TAP MAP TO DISMISS — to close the panel.

When a layer is active, its controls appear in a panel above the map. These vary by layer:

Fires — filter by fire type (wildfire vs prescribed burn).

Weather / Flood — no extra filter needed; the layer automatically shows all active NWS alerts.

Earthquakes — time chips (1 hour, 6 hours, 24 hours, 7 days) and a minimum magnitude slider. Smaller quakes are filtered out as you raise the slider.

Historic Hurricanes — minimum wind speed slider, year slider, storm name search, and Landfall Only toggle. When a storm is selected by name, the sliders are overridden and the full track is shown.

FEMA NRI — hazard focus chips let you drill into a specific risk type (wildfire, earthquake, flood, etc.) instead of overall risk score.

Found on Page 2 under Monitoring. Shows every Atlantic and South Atlantic storm since 2005 with winds of at least 64 kt (Cat 1+).

Track colors indicate peak intensity — green = tropical storm, yellow = Cat 1–2, orange = Cat 3, purple = Cat 4, red = Cat 5.

Tap any track line to open the storm card — it shows peak wind, pressure, and a typewriter narrative for major storms. Tap the View NHC Archive ↗ link for the official NHC report.

Use the name search to find a specific storm. Storms with the same name (Harvey appears in 1981, 1993, 1999, 2005, 2011, 2017) include the year in the dropdown.

CDC SVI (Social Vulnerability Index) — shows census tracts colored by overall social vulnerability. Darker = more vulnerable. Tap a tract to see the four theme scores: Socioeconomic, Household Characteristics, Racial & Ethnic Minority Status, and Housing Type.

FEMA NRI (National Risk Index) — shows overall natural hazard risk by tract. Tap a tract and use the hazard chips to focus on specific risks like wildfire, hurricane, or earthquake.

Combined — overlays both SVI and NRI to identify areas with high vulnerability AND high risk — the most critical intersections for Red Cross pre-disaster planning.

Three boundary layers showing the Red Cross organizational hierarchy:

Division — largest unit, covers multi-state regions. Tap to see the Division name and code.

Region — mid-level operational unit. Tap to see Region name, headquarters city, and RCODE.

Chapter — the local unit that responds directly to disasters. Tap to see Chapter name, ECODE, and parent Region and Division.

These layers are most useful layered on top of hazard data — turn on Fire + Chapter to see which chapter is closest to an active fire.

Tap the MAP button at the far right of the bottom bar to open the basemap picker. Six options:

Dark Gray (default) — neutral dark background, best for seeing colored hazard layers clearly.

Imagery — satellite photography. Best for wildfires and flood extents where terrain context matters.

Topo — topographic map showing terrain elevation. Useful for understanding fire spread and flood drainage.

Streets — road network emphasis. Best for shelter locations and local navigation.

Nat Geo — National Geographic cartographic style. Clean reference map.

Light Gray — white background. Best for vulnerability analysis layers where colored fills need to stand out.