Massachusetts — More than 40 beaches across Massachusetts have been temporarily closed as the state grapples with a dangerous heat wave, forcing officials to warn residents about both extreme temperatures and unsafe swimming conditions.
The beach closures come at a time when much of the Commonwealth is under a Heat Advisory, with forecasters warning that high temperatures combined with elevated humidity could significantly increase the risk of heat-related illnesses through Wednesday evening.
Dozens of Beaches Closed Due to Water Quality Concerns
According to Massachusetts officials, over 40 public beaches were listed as closed on Tuesday, July 14, because water quality failed to meet public health standards.
Among the beaches affected are Hopkinton Reservoir Main Beach in Ashland, Tenean Beach in Boston, Moses Smith Creek in Dartmouth, Freetown Town Beach in Freetown, Freetown Town Beach in Nantucket, and Standish Shores in Wareham.
State officials said the majority of closures are the result of high bacteria levels or harmful cyanobacteria (blue-green algae) blooms, both of which can pose health risks to swimmers.
Massachusetts continuously monitors more than 1,100 public and semi-public beaches, and its online beach status dashboard is updated regularly as new water testing results become available.
Why Beaches Are Being Closed
Health officials say bacteria can enter lakes, ponds and coastal waters through several sources, including stormwater runoff, failing septic systems, leaking sewer connections and waste from wildlife.
Swimming in contaminated water may expose people to bacteria capable of causing gastrointestinal illness, respiratory problems, skin irritation and flu-like symptoms.
Because bacteria levels can fluctuate depending on weather and environmental conditions, beaches may reopen once follow-up testing confirms the water is safe.
Residents planning beach trips are encouraged to check local beach advisories before traveling.
Heat Advisory Covers Most of Massachusetts
The beach closures coincide with a Heat Advisory affecting central, eastern, northeastern, southeastern and western Massachusetts.
Forecasters warn that prolonged exposure to high temperatures and humidity can increase the risk of heat exhaustion and heat stroke, particularly for older adults, young children and people with underlying health conditions.
Although many residents head to beaches during heat waves to cool off, officials say closed beaches should be avoided until water quality improves.
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Officials Urge Residents to Stay Safe
Public health officials recommend taking extra precautions while temperatures remain elevated.
Residents are encouraged to drink plenty of water, wear lightweight clothing, seek air-conditioned spaces whenever possible and limit strenuous outdoor activities during the hottest part of the day.
According to the Centers for Disease Control and Prevention (CDC), an average of 702 heat-related deaths occurred each year in the United States between 2004 and 2018, highlighting the dangers associated with prolonged extreme heat.
Massachusetts is not alone in dealing with beach-related closures this summer. Other parts of the country, including Los Angeles and New York City, have also issued water quality advisories and temporary beach closures amid periods of extreme weather and environmental concerns.
Officials continue to monitor both weather conditions and water quality, with additional updates expected as testing continues throughout the week.
Are you changing your outdoor plans because of the heat or beach closures? Share how you’re staying safe during this summer heat wave in the comments below.