(BIVN) – Much of Hawaiʻi island will be under a Red Flag Warning on Wednesday, as critical fire weather conditions take hold on all islands. 

The National Weather Service in Honolulu says locally strong trade winds, low relative humidity, and dry fuels are prompting the warning, which will be in effect from 10 a.m. Wednesday morning to 6 p.m. Wednesday evening.

East winds of 20 to 30 mph, with gusts up to 40 mph, and relative humidity as low as 40% to 45% percent are expected.

Although a Red Flag Warning does not predict new fire starts, any fires that develop will likely spread rapidly, forecasters say.

The National Weather Service offered these precautions:

• Outdoor burning is not recommended.
• Heat from vehicle exhaust systems can ignite dry grass. Park cars
  on areas that are paved or where vegetation is trimmed and
  cleared.
• High winds contribute to wildfire hazard. Delay activities that
  could throw off sparks until the wind dies down.