HEAT ADVISORY IN EFFECT FROM 11 AM TUESDAY TO 8 PM EDT WEDNESDAY

Heat Advisory issued May 18 at 12:57PM EDT until May 20 at 8:00PM EDT by NWS Boston/Norton MA

* WHAT...Heat index values up to 96 expected.

* WHERE...Much of Southern New England, except for the eastern slopes of the Berkshires, the Rhode Island and Massachusetts South Coast, Cape Cod and the Islands.

* WHEN...From 11 AM Tuesday to 8 PM EDT Wednesday.

* IMPACTS...Hot temperatures, a moderate degree of humidity with little relief Tuesday night may cause heat illnesses.

* ADDITIONAL DETAILS...This is the first multi-day period of hot temperatures. Those not yet accustomed to hot temperatures with a moderate degree of humidity should take appropriate heat-related precautions.

* INSTRUCTIONS...Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives, neighbors and pets.

Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Expires: May 19 at 7:00 AM EDT

AIR QUALITY ALERT IN EFFECT FROM 11 AM TO 11 PM EDT TUESDAY

Air Quality Alert issued May 18 at 11:21PM EDT by NWS Boston/Norton MA

The Massachusetts Department of Environmental Protection has issued an Air Quality Alert for Ground Level Ozone, from 11 AM to 11 PM EDT Tuesday.

An Air Quality Alert day means that Ground Level Ozone concentrations within the region may approach or exceed levels that are Unhealthy for Sensitive Groups.

Air is unhealthy for sensitive children and adults, such as those with asthma, lung or heart disease, and older adults. Sensitive children and adults should limit prolonged outdoor activity.

For additional information, please visit the Massachusetts Department of Environmental Protection website at: https://mass.gov/dep/massair/forecast

Expires: May 19 at 11:15 PM EDT