Dust and ash left over from January’s wildfires in Los Angeles County could be blown by wind and spread across Southern California, causing irritation and health risks.
Windblown dust and ash contain small particles that can cause irritation and worsen existing health conditions, according to the Los Angeles County Health Department. The risk is particularly dangerous for children, the elderly, pregnant women and people with heart or lung conditions, the ministry said in its advisory.
Here’s what you need to know:
What is a Wind Dust Advisory?
Dust and ash left behind by wildfires that have burned tens of thousands of acres across Southern California can be irritating and dangerous if inhaled. Santa Ana is expected to worsen the spread of infection.
“Air quality in some areas may reach levels that are unhealthy or higher for sensitive populations,” the county’s public health department said.
Which areas are most at risk from windblown dust and ash?
People downwind of recent burn scars are especially at risk.
The Altadena area, where the Eaton Fire started on Jan. 7, could see wind gusts of around 25 mph Wednesday evening.
“A lot of ash from the burn scar fell into populated areas,” NBC4 meteorologist David Biggar said.
Most of the ash is likely to blow southwest from the burn scar, Biggar said. Pasadena, Eagle Rock and San Marino are some of the areas where ash could fall from the fire zone.
If the winds are strong enough and blow the ash higher into the atmosphere, it will likely spread even further, Biggar said.
How can you protect yourself from windblown dust and ash?
The county public health department recommends people take the following precautions:
Stay indoors: Keep windows and doors closed. Use an air purifier or recirculate your air conditioning system to keep indoor air clean. Wear a mask: If you must go outside, wear an N95 or P100 mask to protect your lungs. Secure loose items: Tie down items such as chairs, trash cans, and other outdoor belongings or bring them in so they don’t become a hazard. Protect your eyes: If you’re outdoors, wear goggles to protect your eyes from airborne ash and debris. Stay informed: Monitor updates from local news sources for the latest information on weather conditions, air quality, and potential evacuation advisories. Be prepared: Have a plan for supplies and emergency contacts in case the situation worsens. South Coast AQMD The Los Angeles County Department of Public Health has issued a Wind Dust and Ash Advisory until 10pm Tuesday as strong Santa Ana winds are expected to impact air quality across the region.
The South Coast Air Quality Management District (AQMD) may not be reflected in Air Quality Index (AQI) maps because “windblown ash particles may be too large to be detected by air quality instruments.” He warns.
“However, they are usually visible to the naked eye in the air or on outdoor surfaces,” the AQMD states. “Although the AQI indicates green, there may be harmful ash in the air. If you smell smoke or see ash, please use extreme caution.”
See the Los Angeles County air quality map here.
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