Extremely dangerous heat Wednesday through Saturday in Maryland

Maryland will experience extreme heat this week after comfortable weather to start the week. 

Wednesday, July 1, through Saturday, July 4, are First Alert Weather Days due to impacts from dangerous heat. A few severe thunderstorms could also develop towards the end of the heat wave as the holiday weekend arrives.

Tuesday will be hot, but nothing extreme. We'll top out in the lower 90s. It will feel like it's in the mid-90s, with the mugginess factored in. You'll want to get any strenuous outdoor activities or work done by Tuesday before the heat turns dangerous Wednesday through Saturday. 

A heat wave is set to impact much of the Mid-Atlantic and surrounding areas heading into the middle of the week. Afternoon high temperatures will spike into the upper 90s and lower 100s for multiple afternoons. With humidity factored in, it will feel hotter than 105°. It may feel like as hot in 110° in a few spots. Due to the combination of heat and humidity, the First Alert Weather team has issued First Alert Weather Days starting Wednesday into the Fourth of July holiday on Saturday. 

Overnight temperatures remain warm, as well. It may fail to cool below the upper 70s - and even low 80s - a few nights this week. You will need to use extra caution if working outside and check on those without adequate ways of cooling off. It will remain especially warm overnight in Baltimore City and other areas with lots of concrete. 

Extreme heat watches and warnings are likely to be issued across Maryland as we approach Wednesday and later in the week. Alerts are already in effect farther north across Pennsylvania.

A few gusty storms may pop-up Thursday and Friday afternoons. The possibility of severe thunderstorms increases Saturday into Sunday. Storms may impact firework celebrations across the area on Independence Day. 

Stay tuned for updates on this as the data becomes clearer.