New research shows wildfire smoke is eating into years of smog improvements, raising ozone and public‑health risks across the U.S. and straining monitoring systems. Experts say more sensors and better models are needed to protect communities.

A Code Orange air‑quality forecast covers parts of the D.C. region; officials warn sensitive groups to limit outdoor exertion and follow regional guidance.

A fleet of yellow-and-white 'Bob' buoys now stream live water-quality readings from the Potomac, Anacostia and Shenandoah to a public dashboard. The data show pH, temperature, turbidity and more.

Sunny Thursday with highs near 89°F and a warm weekend ahead. Expect low‑90s Friday–Saturday and a chance of storms late Saturday into Sunday.

Clear, sunny Wednesday in D.C. with a high near 83°F. Expect 90s by the weekend and a Coastal Flood Advisory around Annapolis this morning.

Cool, mostly sunny Tuesday with highs near 76°F. Late-week heat builds into the low 90s and showers are possible Sunday.

Clear, mild start in D.C.; high near 79°F. Morning tide may cause minor flooding in Annapolis; mariners should heed advisories.

The Capital Weather Gang has split from The Washington Post and relaunched as Capital Weather, promising the same local forecasts from a new independent site and app.

Sunny and mild Sunday in D.C., with highs near 77°F. A southerly surge tonight could raise Chesapeake water levels and bring a Small Craft Advisory.

A Washington-based coalition led by Whit Fosburgh has launched a national campaign to curb industrial ‘reduction’ fishing of menhaden, herring and other forage species to protect coastal fisheries and jobs.

Sunny, breezy Saturday in D.C.; highs near 73°F and gusts up to 26 mph. Small craft advisories are in effect this evening.

Clear and sunny Friday in D.C., with highs near 79°F. Cooler, breezy Saturday with gusts up to 23 mph.

Canberra has filed a multibillion‑dollar suit against 3M, blaming decades‑old firefighting foam for PFAS contamination at 28 defence sites. Officials say taxpayers have already spent more than A$1.3 billion on cleanup.