Update, 4 p.m.: In addition to the heat advisory, the National Weather Service has issued a severe thunderstorm warning for all of Oakland County, including the Oakland Township area.

Hail, dangerous winds and isolated tornadoes are possible, according to the weather service's hazardous weather outlook.

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Whatever you have planned to do outdoors today, better do it sooner than later. 

With temperatures expected to reach into the 90s today, the National Weather Service is issuing a heat advisory and warning residents to be careful.

We're not yet used to the heat this early in the season, so a second consecutive day of hot temperatures now can be hazardous to people prone to heat stress or others engaged in strenuous outdoor activity. 

Temperatures will to rise into the lower 90s during the afternoon and the "real feel" is expected to climb into the upper 90s by mid- to late afternoon.

The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible, the NWS says.

Drink plenty of fluids, stay in an air-conditioned room and stay out of the sun.

Children and pets should never be left unattended in vehicles under any circumstances, of course. And it's a good idea to check on relatives and neighbors who might be negatively affected.