Eight locations received more than 100 millimetres of rain within 24 hours.
Four places experienced heavy to very heavy rainfall, while 47 places got heavy rain.
The system is expected to move northwestward over the next day, keeping rain likely for six days.
Orange warning advises readiness to act; yellow warning advises awareness.
School closures impacted 89 schools in Bhadrak and all schools in Nabarangpur.
The India Meteorological Department reported up to 169.4 millimetres of rain in Joda, Keonjhar.
Orange and yellow warnings were issued for 16 districts, and thunderstorms with lightning are expected.
Schools and anganwadi centres were closed in several districts as a safety measure.
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