Overview
- Hot, humid conditions this week have prompted heat advisories and heat‑index values near or above 100°F across parts of the Midwest, Mid‑Atlantic and Northeast, increasing the risk of heat‑related illness and strain on infrastructure.
- Rounds of showers and thunderstorms are forecast through Wednesday, Thursday and Friday with the Storm Prediction Center highlighting a multi‑day severe risk and local National Weather Service offices already issuing watches and warnings for damaging winds, large hail and flash flooding.
- Tropical Storm Edouard made landfall near Johnson Bayou on Tuesday and has weakened inland while heavy rainfall and flood watches remain in place across parts of southeastern Texas and southwestern Louisiana with power outages reported.
- A disturbance near Baja is forecast to strengthen into Hurricane Marie later this week and could drive larger south‑facing swells, higher rip‑current risk and added tropical moisture into Southern California depending on its track.
- Western communities face separate threats from wildfire smoke and elevated to critical fire weather in parts of Montana, and forecasters say a late‑week cold front should bring cooler, drier weather for much of the country over the Labor Day weekend though timing and tropical tracks remain uncertain.