For a toddler’s health, this is a significant concern. While not every black mold is the infamous Stachybotrys, prolonged exposure to any mold can aggravate respiratory issues, trigger allergies, and cause persistent coughing or congestion. The musty smell on your clothes confirms active microbial growth.

Legally, your landlord is responsible for fixing the source of the moisture under Dubai’s rental laws, as it constitutes a defect that affects the property’s habitability. You should formally notify them in writing with photos. However, the urgency for your family’s health may mean you need to act first and seek reimbursement.

This is not a DIY job. Disturbing the mold without proper containment will release a massive amount of spores throughout your home. A professional inspection is critical to identify the exact moisture source and the mold species. Remediation involves isolating the area, removing contaminated materials like drywall, HEPA vacuuming, and antimicrobial treatment to prevent regrowth. Given the extent you’ve described, involving a certified remediation company is strongly advised to ensure it’s resolved safely and completely.