BOSTON (WHDH) - The third straight 90-degree day of the week on Thursday marked Boston’s fourth heat wave of the summer.

The temperature in the city hit 90 degrees around 11 a.m.

A heat advisory has been issued until 8 p.m. Thursday for the majority of Massachusetts with the heat index nearing 100 degrees.

Temperatures are expected to near 90 degrees Friday before falling into the low 70s Saturday.

Visit the 7Weather page for the latest updates.

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