The answer to 'drainage system dead trees' is that a failing drainage system and dead trees are often related issues that require professional attention. Symptoms may include standing water, soil erosion, and trees dying or becoming unstable. Common causes include clogged drains, broken pipes, and root intrusion.
In many cases, a professional landscaper or drainage specialist will need to inspect the property, diagnose the root cause, and implement a comprehensive solution. This may involve clearing debris, repairing or replacing drainage components, and removing hazardous trees. Attempting DIY repairs without proper expertise can lead to further damage, so it's generally best to call in a pro for these complex issues.