LAKE HAVASU CITY, Ariz. (AP) — Signs warning of the dangers of a rare amoeba will be posted at Lake Havasu, telling swimmers to take precautions such as plugging their noses when they dive.

The City Council voted on Tuesday to take the action after last month's death of 14-year-old Aaron Evans, who doctors believe was infected with the amoeba, Naegleria fowleri, while swimming at the Colorado River reservoir.

"I'm happy with it," said Keith Evans, Aaron's grandfather. "It shows they're stepping up."

The city will post the signs along the roughly one mile of waterfront it owns. Arizona and California share jurisdiction on the remaining lake frontage, along with county and state agencies and Indian tribes. Mohave County also is considering posting signs and the Board of Health will take up the matter next month, said Patty Mead, director of the county health department.