Wednesday brought haze and thick smoke to Boston area skies as wildfires sent smoke drifting across the Northeast. Massachusetts hit the high 90s despite the smoky air. Forecasters expect thicker air before cleanup begins as weekend rain may clear the air . Low-pressure systems kept the capital region locked in humid 90s.Boston’s dull view follows wildfires that pushed risky smoke deep into the region. Smoky layers lingered over the harbor.