<p>A former tool plant burned in Parkersburg, West Virginia on October 21, sending up towers of black smoke.</p><p>The cause of the fire is still unknown, and local news sources said</a> it is expected to burn for days.</p><p>The 400,000 square foot facility caught fire in the early morning of October 21 and contained plastic materials. No one was injured, but local news outlets said</a> the West Virginia Department for Environmental Protection advised citizens to avoid contact with the smoke. Credit: Tim Garretson via Storyful</p><br />