Early winter counts put western monarchs near historic lows, with mid‑season tallies in the low thousands and local groves logging only a handful of butterflies.

An overflow at the Russian River treatment plant near Guerneville sent untreated wastewater into the lower river during Tuesday’s storms. Officials have posted warnings and asked people to avoid the water while assessments continue.

Flood warnings remain near Mark West Creek in Sonoma even as the Bay Area dries out. Hazardous surf and a late-week chill are on the way.

A Monday storm will bring the heaviest rain to the North Bay, with up to 4 inches possible in mountain terrain and coastal advisories in effect.

Marin County faces severe flooding from heavy rains and high tides, disrupting travel and impacting residents. Infrastructure damage and power outages are widespread as officials and first responders address the emergency.

Starting Jan. 1, Californians will pay a 1.5% recycling fee (capped at $15) on products with non‑removable batteries. Officials say proceeds will fund safer collection and recycling.

Rain returns Wednesday through the weekend while king tides Wed–Sun raise coastal flood risk. A cold advisory hits early Tuesday and winds may pick up late week.

Storm-driven refills at San Luis Reservoir could erase thousands of acre‑feet Napa has been banking off‑site, officials warn. The city sold some reserves to reduce risk.

NOAA's 10‑foot sea‑level visualization shows neighborhoods from the Bay Area to Florida in potential inundation zones, and new research warns thousands of hazardous sites could flood by 2100.

Analysis shows the Forest Service treated under 1.7M acres through Sept.—well below recent averages. Senators and firefighters are demanding staffing and mitigation plans.

A shallow 3.7-magnitude quake shook the Geysers area before dawn, prompting felt reports but no immediate damage reports. Local seismologists revised the initial reading to 3.7.

EPA's proposed rewrite of WOTUS would narrow which wetlands the Clean Water Act protects, prompting warnings from conservationists and praise from farm groups.

The article discusses Napa County's collaboration with the DWR to install five new stream gages for better water management, funded by the Budget Act of 2023.