Sylmar, California

The same ground, surveyed 95 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1900 1995

Matched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.

• 1900 USGS Fernando quadrangle1:62500, 4 printings
• 1900 USGS San Fernando quadrangle1:62500, 2 printings
• 1901 USGS Southern California Sheet No. 1 quadrangle1:250000, 6 printings
• 1904 USGS Southern California Sheet No. 1 quadrangle1:250000, 2 printings
• 1925 USGS Sylmar quadrangle1:24000
• 1928 USGS Sylmar quadrangle1:24000
• 1929 USGS Sylmar quadrangle1:24000
• 1935 USGS Sylmar quadrangle1:24000, 3 printings
• 1940 USGS San Fernando quadrangle1:62500, 2 printings
• 1945 USGS San Fernando quadrangle1:62500
• 1949 USGS Los Angeles quadrangle1:250000, 2 printings
• 1953 USGS San Fernando quadrangle1:24000, 3 printings
• 1955 USGS Los Angeles quadrangle1:250000
• 1959 USGS Los Angeles quadrangle1:250000, 3 printings
• 1966 USGS Los Angeles quadrangle1:250000
• 1966 USGS San Fernando quadrangle1:24000, 3 printings
• 1975 USGS Los Angeles quadrangle1:250000, 2 printings
• 1979 USGS Los Angeles quadrangle1:100000
• 1995 USGS San Fernando quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 441 fires within 5 miles of Sylmar between 1992 and 2020, burning about 28,360 acres in total. 1 started naturally. 69 were recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

Settlements close enough to share some of these fires:

• Olive View
• Rancho Cascades
• San Fernando
• El Merrie Dell
• Elayon
• Kagel Canyon

Every fire recorded in Los Angeles County

Regional context, not property-specific evidence. The federal mineral resources record lists 23 workings within 5 miles of Sylmar: 17 past producers, 5 prospects, 1 occurrence. None of them still produces. What was taken out: Sand and Gravel, Construction, Limestone, General, Asbestos, Granite, Stone, Crushed/Broken. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Every working recorded in Los Angeles County

Regional context, not property-specific evidence. The National Weather Service names Sylmar in 3 storm reports between 2025 and 2026: 2 thunderstorm wind, 1 flash flood. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.

Every storm recorded in Los Angeles County

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

This settlement is recorded in the Geographic Names Information System as feature 1661539. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.

Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.

Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.

Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.