It's very hot here in Buffalo. Despite our two natural " air conditioners", Lake Erie and Lake Ontario. But we've got it good compared to the Midwest.

In Oklahoma City, forecasters expected another day of 100-degree heat Sunday, which would be the 27th day this year the city has reached 100 or above. The city is on pace to break its record for such days – 50 set in 1980 – with triple-digit heat possible through September.

It's even worse in western Oklahoma, where temperatures at 110 or above have been common in recent weeks. In Enid, asphalt at a major intersection along U.S. Highway 412 buckled Saturday night from the intense heat.

Cooling centers also were open in Detroit to help residents who don't have air conditioning at home. Here's some tips to stay cool: