Houston Skyline as seen from the Waco Street bridge in east Houston. February 4, 2020

The National Weather Service on Tuesday issued a red flag warning across Harris County, alerting that conditions are favorable for wildfires.

The warning was upgraded from a fire weather watch overnight and expands across areas along and west of Interstate 45. The warning will be in effect until Tuesday evening, according to the weather service.

Wind gusts potentially reaching 45 miles per hour and a relative humidity of 15 to 25 percent prompted the weather service to issue the warning. A Gale Warning alerting of sustained winds ranging from 35 to 47 knots and hazardous wind and wave conditions was also issued across all Gulf waters and Galveston Bay.

“It’s likely just going to be some very isolated instances if anything, but chances are much higher towards the northeast of the Houston area as far as severe weather goes,” Cameron Batiste, a meteorologist with the National Weather Service said.

Some storms could become strong to severe, running the risk of strong wind gusts, hail and isolated tornadoes.

There is a slight risk of severe weather for locations generally east and northeast of the Houston metro area and a marginal risk along and east of the Interstate 45 corridor, according to the weather service.

The red flag warning will be in effect from 10 a.m. to 7 p.m. for areas along and west of Interstate 45 and until 6 p.m. for all areas of Southeast Texas. If strong winds materialize, sporadic power outages are possible.

The weather service is encouraging residents to avoid open flames or sparks, keep vehicles off of dry grass and properly discard cigarettes. Residents should avoid all fire-related activities and use extreme caution if working with equipment that could spark.

A coastal flood advisory is also in effect over each high tide cycle through 9 p.m. Tuesday.