Hazy and warm weather are on deck for Thursday in Massachusetts — but here's when the rain will start this weekend.

Right now, wildfires are raging across over 7 million acres of Western Canada’s boreal forest, a continuous blanket of conifers and growth that covers much of the country and is particularly susceptible to changes in the climate, like warmer temperatures and less snow or rain.

Maps show where new plumes of smoke will cause hazy skies through the end of the week. Low-level smoke is forecast to spread eastward Wednesday across the Appalachians and into the Mid-Atlantic and Northeast.

Hot temperatures, smoky skies and rip currents are on the radar in Massachusetts on Wednesday — here's what to expect.

Smoke from Canadian wildfires​ is headed toward Massachusetts, and prompting concerns about air quality in Boston.

“Most of the time, the smoke will be high-flying and dim the sun, leading to vivid sunrises and sunsets and causing a hazy appearance to the sky overhead,” AccuWeather Meteorologist Brandon Buckingham said.

Smoke from more than 200 Canadian fires is once again dimming skies around Boston, with a thicker haze expected Thursday that could be harmful to sensitive populations.

It's rained in Boston for 12 Saturdays in a row. WBZ-TV meteorologists Jacob Wycoff and Terry Eliasen take a look at the forecast for this weekend and discuss the Canadian wildfire smoke affecting air quality in Massachusetts.