New Central Govt Heat Risk Perspectives – highlights risks to public health – indicates widespread potential for major and serious consequences. A Level 4 of 4 or extreme heat threat affects parts of a dozen states. A much larger portion is expected in Level 3 or major heat risk areas.
Cities from Chicago to Cincinnati in the Midwest and Philadelphia to Atlanta in the east are forecast to reach Level 4 at some point in the next week.
“Infrequent and/or prolonged extreme heat of this magnitude affects anyone with little or no overnight relief and effective cooling and/or adequate hydration,” the weather service wrote.
In which areas are heat warnings issued?
Heat advisories and warnings Extends from the lower Great Lakes and Ohio Valley through the northern Mid-Atlantic and New England, including much of Maine. About 70 million people are under this heat warning.
Detroit and Flint Inn MichiganFort Wayne and Marion Inn Indiana, and Defiance in Ohio Extreme heat warnings remain in place until Friday. Temperatures are forecast to soar between 95 and 100, and heat indices — taking humidity into account — could climb to around 105.
Most cities in Ohio, Pennsylvania, New York, Vermont, Massachusetts, Connecticut and New Jersey are under heat warnings.
Extreme heat watches also cover parts of the same area, including Hartford, Kan.; Philadelphia; and parts of the Boston metro northward to southeastern Maine.
Where will it be warm?
East of the Mississippi River, warm conditions will initially focus on the Ohio Valley and western Pennsylvania. Temperatures will be in the low and mid 90s Tuesday and climb near 100 Friday and Saturday.
A region from northern Kentucky through the Mid-Atlantic and south could see more sustained heat, with highs in the 90s and rising near 100 over the weekend.
Where is the heat most unusual?
Through Thursday, places from the Great Lakes to Pennsylvania and New England will feel unusually warmer than normal. By the end of the week, that area will likely move south to cover the Midwest and Mid-Atlantic.
Afternoon temperatures in Maine on Wednesday are forecast to be 20 to 25 degrees above normal.
The weather service office serves the area around Portland, Maine. He said predicted heat Between Mars and Jupiter will be very intense from July 2011. Meanwhile, the Burlington, Vt., weather service office said Montpelier could be seen Wednesday was the hottest day in 30 years.
What records can be set
Record-warm afternoon highs in the 90s to near 100 and warm overnight temperatures in the 70s to near 80 could be threatened daily through the weekend.
Some of the many calendar-day entries that could come up over the weekend:
- Syracuse, NY, Tuesday: With 96 forecast, a second record in a row is possible.
- Millinocket, Maine, Wednesday: A forecast of 97 will break the record high of 95.
- Manchester, NH, Thursday: A forecast of 99 will break the record high of 98.
- Philadelphia on Friday: Temperatures around 100 could test 99 or top out.
- CHARLESTON, W.Va., Saturday: A forecast high of 97 is near a record high of 98.
- WASHINGTON Sunday: The capital’s forecast is 97, near the record high of 98 for the day.
Places with less extreme heat but multiple daily records are possible include Pittsburgh; Hartford; Bangor, Maine; Areas around Boston and parts of the Appalachians.
How hot was it already?
The heat wave was in its infancy on Monday, but some impressive numbers were still seen. In Ohio, it rose to 99 in Toledo. Several calendar-day record highs were broken across the wider region.
Some notable records include:
Several record-warming lows were also newly established in the same areas on Monday.
Parts of the north that will see intense heat mid-week will get some relief this weekend and early next week as a cold front moves through. A break could mean a few days closer to average than a prolonged cold spell.
In the south, the heat may ease slightly early next week – with temperatures nearing normal early-summer levels.
As June ends and July begins, the most reliable computer weather models project warmer-than-normal conditions across the country.
Is climate change making this worse?
Global temperatures have been at record highs for one year due to both the El Niño climate pattern and human-caused climate warming. As El Nino fades and La Nina arrives, global warming should decrease somewhat in the coming months.
The Climate Change Index Climate Central, a science communication organization based in Princeton, NJ, indicates that human-caused climate change is making this week’s record test heat at least 1.5 to 2 times more likely.
