BOSTON (WHDH) - Despite the return of summer-like temperatures this week, bodies of water across New England will still be dangerously cold, officials warn.

Water temperatures in Massachusetts lakes and ponds will remain in the 40s and 50s even as air temperatures soar into the upper 80s over the next few days. Ocean temperatures will also still be hovering in the 40s, which means area residents should be cautious when considering going for a dip this week, the Department of Conservation and Recreation said in an alert Tuesday.

“With the start of warmer air temperatures, it is important that we all use caution near water bodies, particularly this time of year, when cold water temperatures can be detrimental to one’s safety,”  DCR Commissioner Leo Roy said in a statement.

Hypothermia can set in after about 15 to 30 minutes in 32.5-40 degree water temperatures and in 30 to 60 minutes in 40-50 degree water temperatures, according to the DCR.

Signs of hypothermia include shivering, dizziness, nausea, increased breathing, difficulty in speaking, confusion, diminished coordination, fatigue and an increase in heart rate.

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