Canadian wildfire smoke causes hazy skies in Massachusetts, impacting air quality and prompting health alerts in neighboring states. Temperatures are set to rise with possible thunderstorms.

The National Weather Service issues a hazardous weather outlook for central North Carolina, warning of potential minor flooding and stormy conditions.

The article details the weather forecast for Oklahoma City, reporting overcast conditions with temperatures at 58°F and high humidity, as well as the outlook for intermittent rain and thunderstorms over the coming days.

Houston is set to experience a mix of weather including possible storms, summer heat, and severe weather threats, with high temperatures nearing 100°F and minimal overnight cooling. Residents are reminded to practice heat safety.

St. Louis forecasts wet weather with showers and thunderstorms throughout the week. A Hazardous Weather Outlook warns of potential severe weather and damaging winds.

Rain and cooler temperatures greeted Chicago commuters today, with a high chance of showers continuing into the evening. The weekend is expected to be mostly sunny and dry.

Ohio is expected to experience a weather shift as the current high pressure moves away, leading to chances of showers and thunderstorms later in the week, with low severe weather potential and warm temperatures persisting.

The National Weather Service forecasts a warm, partly cloudy day in Nashville with a high of 91 and a slight chance of showers and storms later in the week.

Cleveland anticipates mixed weather with near-record heat, thunderstorms, and mugginess as a cold front moves in, bringing storm risks, especially in northwest Ohio.

Washington D.C. is expected to enjoy sunny, warm weather with highs near 88°F, but the weekend forecast indicates a 30-70% chance of rain and possible thunderstorms.

Pittsburgh is under a high pressure system, causing dry, warm conditions with temps in the mid to upper 80s. The National Weather Service predicts showers and potential severe thunderstorms with a slow-moving cold front starting Thursday.

Boston faces a shift from high heat to potential storms, with temperatures nearing 90s before transitioning to a cooler weekend with a likelihood of rain and thunderstorms.

The National Weather Service forecasts fluctuating weather in Indianapolis, with a mix of sun, showers, and thunderstorms expected throughout the week.