A teenager was killed in a four-wheel drive rollover in August, while two teenagers were flown to hospital after their four-wheel drive crashed on the beach last month.
The ABC revealed this week onlookers and rescuers at the scene of both the double drowning and fatal crash said they were unable to raise help from the beach due to a lack of phone reception, causing significant delays to emergency service response times.
Noosa Shire Council Mayor Clare Stewart, also chair of Noosa's Local Disaster Management Group, told the ABC reception black spots in the area were "a real concern".