The city of Mill Valley has enacted an urgency ordinance to regulate small cell" towers amid concerns that cellphone companies want to grow their 5G networks and install new equipment in Marin [County]. The decision came on a unanimous vote by the City Council on Thursday, after residents from across Marin packed the council chambers as part of a campaign urging local officials to block cellphone companies from attempting to build 5G towers in the county. The issue is that 5G towers ... could exacerbate health symptoms already suspected as a result of exposure to electromagnetic fields. Those symptoms can include fatigue, headaches, sleep problems, anxiety, heart problems, learning and memory disorders, ringing in the ears and increased cancer risk. San Anselmo and Ross have adopted ordinances similar to Mill Valley's, while other Marin communities are struggling with how to develop rules, a task complicated by federal restrictions already in place. "There are some federal and state regulations that preempt local control," said Fairfax Mayor Peter Lacques. Federal and state laws make it so municipalities cannot regulate: radio frequencies or electromagnetic waves that comply with Federal Communications Commission regulations, certain modifications to existing wireless telecommunications facilities, [or] the installation of wireless telecommunications facilities on existing utility poles in the public rights of way.