* WHAT. Heat index values up to 101 expected. * WHERE. Portions of northern Connecticut, central, eastern, northeastern, and western Massachusetts, and northern Rhode Island. * WHEN. From noon Tuesday to 7 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. For the Heat Advisory, heat index values up to 100 expected. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 102 possible. * WHERE. In Connecticut, Hartford CT and Tolland CT Counties. In Massachusetts, Central Middlesex MA, Southeast Middlesex MA, Western Norfolk MA, Western Essex MA, Eastern Franklin MA, Eastern Hampden MA, and Eastern Hampshire MA Counties. * WHEN. For the Heat Advisory, from noon to 7 PM EDT Tuesday. For the Excessive Heat Watch, from Wednesday afternoon through Friday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Heat index values up to 99 expected. * WHERE. In Massachusetts, Eastern Plymouth MA, Northern Bristol MA, and Western Plymouth MA Counties. In Rhode Island, Bristol RI, Eastern Kent RI, Southeast Providence RI, and Western Kent RI Counties. * WHEN. From noon Wednesday to 7 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 97 expected. * WHERE. In Massachusetts, Eastern Plymouth MA, Northern Bristol MA, and Western Plymouth MA Counties. In Rhode Island, Bristol RI, Eastern Kent RI, Southeast Providence RI, and Western Kent RI Counties. * WHEN. From noon Wednesday to 7 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS. Not much relief at night, with heat indices in the 70s at night.

* WHAT. For the Heat Advisory, heat index values up to 97 expected. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 105 possible. * WHERE. In Connecticut, Hartford CT and Tolland CT Counties. In Massachusetts, Central Middlesex MA, Southeast Middlesex MA, Western Norfolk MA, Western Essex MA, Eastern Franklin MA, Eastern Hampden MA, and Eastern Hampshire MA Counties. * WHEN. For the Heat Advisory, from noon today to 7 PM EDT this evening. For the Excessive Heat Watch, from Wednesday afternoon through Friday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. Not much relief at night, with heat indices in the 70s.

* WHAT. Heat index values up to 99 expected. * WHERE. Portions of northern Connecticut, central, eastern, northeastern, and western Massachusetts, and northern Rhode Island. * WHEN. From noon today to 7 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS. Not much relief at night, with heat indices in the 70s.

* WHAT. Heat index values up to 97 expected. * WHERE. In Massachusetts, Eastern Plymouth MA, Northern Bristol MA, and Western Plymouth MA Counties. In Rhode Island, Bristol RI, Eastern Kent RI, Southeast Providence RI, and Western Kent RI Counties. * WHEN. From noon Wednesday to 7 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 99. * WHERE. Portions of northern Connecticut, central, eastern, northeastern, and western Massachusetts, and northern Rhode Island. * WHEN. Until 7 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. For the first Heat Advisory, heat index values up to 100. For the second Heat Advisory, heat index values up to 102 expected. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 101 possible. * WHERE. In Connecticut, Hartford CT and Tolland CT Counties. In Massachusetts, Central Middlesex MA, Southeast Middlesex MA, Western Norfolk MA, Western Essex MA, Eastern Franklin MA, Eastern Hampden MA, and Eastern Hampshire MA Counties. * WHEN. For the first Heat Advisory, until 7 PM EDT this evening. For the second Heat Advisory, from 8 AM to 7 PM EDT Wednesday. For the Excessive Heat Watch, from Thursday morning through Friday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Heat index values up to 95 expected. * WHERE. In Maine, Kennebec, Southern Somerset, and Southern Franklin Counties. In New Hampshire, Sullivan, Northern Carroll, Southern Grafton, and Cheshire Counties. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS. Warm overnight low temperatures in the 70s will result in greater cumulative heat stress.

* WHAT. For the Heat Advisory, heat index values up to 100 expected. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 105 possible. * WHERE. Portions of southwest and western Maine and central, northern, and southern New Hampshire. * WHEN. For the Heat Advisory, until 8 PM EDT this evening. For the Excessive Heat Watch, from Wednesday afternoon through Thursday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. Warm overnight low temperatures in the 70s will result in greater cumulative heat stress.

* WHAT. Heat index values of 95-100 expected during the afternoon and early evening each day. * WHERE. Northern Middlesex and Northern New London Counties. * WHEN. From noon Wednesday to 8 PM EDT Thursday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

The Connecticut Department of Environmental Protection has issued an Air Quality Action Day for Ground Level Ozone, from 11 AM to 11 PM EDT Tuesday. An Air Quality Action day means that Ground Level Ozone concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Environmental Protection website at: https://portal.ct.gov/deep

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 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/orgs/massachusetts-department-of-environmental- protection