Monday evening’s thunderstorms won’t be the last of them.
The National Weather Service warned northeast and north central Illinois will likely see thunderstorms “capable of producing torrential rainfall” and possible flash flooding Tuesday afternoon into the evening.
A heat advisory was also issued for Chicagoland from noon until 8 p.m. Heat indexes — the way the body feels temperature — will reach between 100 and 110 degrees as humid conditions and high temperatures in the low- to mid-90s combine.
“That’s all very dangerous to people,” meteorologist Mike Bardou said. “So people need to take precautions in terms of trying to limit their time outside if they can.”
As heat illnesses can occur under these conditions, the Office of Emergency Management and Communications (OEMC) reminded Chicagoans to check in on family, neighbors and vulnerable populations, and to call 311 if in need of assistance or 911 with emergency needs.
The NWS reminded the public to stay hydrated and out of the sun, and to wear lightweight, loosefitting clothing. The Chicago Park District also offers many water spray features across the city for cooling relief.
But if you live close to Lake Michigan, you might just escape the intense heat. Temperatures will drop down to around 70 degrees in the afternoon near the lake, according to the NWS.
Thunderstorms might cause localized flash flooding in the Chicago metro area, though the NWS said the main threats are 70 mph damaging winds and hail up to one inch in diameter.
And there’s a reason beyond high temperatures to stay inside: lightning.
“We definitely want to have people be weather-aware this afternoon and this evening,” Bardou said. “And certainly, if you’re outside, be careful of that lightning. That’s gonna be one of the big threats — a lot of lightning and certainly heavy downpours and some gusty winds.”
Some thunderstorms might extend into Wednesday and Thursday as well, according to the NWS.